On November 5, 2021, the Company, certain subsidiaries of the Company (the “Subsidiary Guarantors”), the lenders party thereto, and an administrative agent (the "Agent"), entered into the Credit Agreement. The Credit Agreement provides for a term loan facility (the "Term Loan") in the original principal amount of $165,000, a delayed draw term loan facility in the original principal amount of $35,000 (available to be drawn up to 18 months from the date of the Credit Agreement) (the “Initial DDTL” and together with the Additional DDTL, the “DDTL”) and a revolving credit facility in the original principal amount of $15,000. On November 5, 2021, the Company borrowed the full amount of the term loan facility, but did not borrow any amounts on the DDTL or the revolving credit facility.

The Company could have elected to borrow on each of the loan facilities at either an adjusted LIBOR rate of interest or an adjusted prime rate of interest. Adjusted LIBOR rate loans accrued interest at an annual rate equal to the LIBOR rate plus a margin of between 6.00% and 6.50%, depending on the Company’s then current Secured Leverage Ratio (as defined in the Credit Agreement). The LIBOR rate had to be a minimum of 1.00%. The initial adjusted LIBOR rate of interest was the LIBOR rate plus 6.25%. Adjusted prime rate loans accrued interest at an annual rate equal to the prime rate plus a margin of between 5.00% and 5.50%, depending on the Company’s then current Secured Leverage Ratio. The initial adjusted prime rate of interest was the prime rate plus 5.25%.

The Company must pay (i) a fee based on a percentage per annum equal to 0.50% on the average daily undrawn portion of the commitments in respect of the revolving credit facility and (ii) a fee based on a percentage per annum equal to 1.00% on the average daily undrawn portion of the commitments in respect of the delayed draw loan facility. In each case, such fee shall be paid quarterly in arrears.

Each of the term loan facility and delayed draw term loan facility require annual principal payments in an amount equal to 1.00% of their respective original principal amounts. The Company shall also repay the term loan facility on an annual basis in an amount equal to a percentage of its Excess Cash Flow (as defined in the Credit Agreement), which percentage will be determined by its then current Secured Leverage Ratio. Each of the loan facilities may be repaid at any time. Voluntary prepayments were subject to a 1.00% prepayment premium if made on or prior to November 5, 2023 and other breakage penalties, as defined in the Credit Agreement. Voluntary prepayments made after November 5, 2023 are not subject to any prepayment premium.

The Company is required to maintain a Secured Leverage Ratio of not more than 4.25 to 1.00 for the Company's fiscal quarters through the fiscal quarter ended June 30, 2023, 3.75 to 1.00 beginning with the Company’s fiscal quarter ended September 30, 2023, and 3.00 to 1.00 beginning with the Company’s fiscal quarter ended March 31, 2025. The Company is required to maintain a minimum Fixed Charge Coverage Ratio (as defined in the Credit Agreement), which ratio was 1.00 to 1.00 during the first year of the Credit Agreement and is 1.10 to 1.00 from and after the Credit Agreement’s first anniversary. The covenants related to the Secured Leverage Ratio and Fixed Charge Coverage Ratio were amended by the Seventh Amendment.

Each of the loan facilities is secured by all assets (other than certain excluded assets) of the Company and each of the Subsidiary Guarantors. Repayment of each of the loan facilities is guaranteed by each of the Subsidiary Guarantors.

On January 7, 2022, the Company drew $35,000 on the Initial DDTL. Amounts outstanding under the Initial DDTL accrued interest at an annual rate equal to the LIBOR rate plus a margin of between 6.00% and 6.50%, depending on the Company’s then current Secured Leverage Ratio (as defined in the Credit Agreement). The initial adjusted LIBOR rate of interest was the LIBOR rate plus 6.25%.

The Term Loan and the Initial DDTL will mature on November 5, 2026.

First Amendment to Credit Agreement

On January 27, 2022, the Company, Subsidiary Guarantors, the lenders party thereto, and the Agent entered into the First Amendment to the existing Credit Agreement. The First Amendment provides for, among other things, an increase to the existing term loan facility in the amount of $40,000 (the “Incremental Term Loans”) and the Additional DDTL in the original principal amount of $35,000, which amount is available to be drawn up to 24 months from the date of the First Amendment. The Incremental Term Loans and any amounts borrowed under the Additional DDTL are referred to herein as the “Additional Term Loans”. On January 27, 2022, the Company borrowed the full amount of the Incremental Term Loans, and on October 12, 2022, the Company borrowed the full $35,000 under the Additional DDTL.

Amounts outstanding under the Additional Term Loans accrued interest at an annual rate equal to the LIBOR rate plus a margin of between 6.00% and 6.50%, depending on the Company’s then current Secured Leverage Ratio (as defined in the Credit Agreement). The initial adjusted LIBOR rate of interest was the LIBOR rate plus 6.25%.

The Additional Term Loans require annual principal payments in an amount equal to 1.00% of the original principal amount. Voluntary prepayments of the Additional Term Loans were subject to a 1.00% prepayment premium if made on or prior to November 5, 2023 and other breakage penalties, as defined in the Credit Agreement. Voluntary prepayments made after November 5, 2023 are not subject to any prepayment premium.

The Company shall also repay the term loans on an annual basis in an amount equal to a percentage of its Excess Cash Flow (as defined in the Credit Agreement), which percentage will be determined by its then current Secured Leverage Ratio.

The Additional Term Loans are secured by all assets (other than certain excluded assets) of the Company and each of the Subsidiary Guarantors. Repayment of the Additional Term Loans is guaranteed by each of the Subsidiary Guarantors.

The Additional Term Loans will mature on November 5, 2026.

Second Amendment to Credit Agreement

On December 29, 2022, the Company, the Subsidiary Guarantors, the lenders party thereto, and the Agent, entered into a Second Amendment (the “Second Amendment”) to the Credit Agreement.

The Second Amendment provided for, among other things, an extension of the deadline for the Company to provide to the lenders the audited financial statements for the Company’s fiscal year ended September 30, 2022 and an annual budget for 2023; the Company satisfied these requirements by the extended deadline. The Second Amendment added a requirement that the Company provide, within 30 days after the end of each month, an unaudited consolidated balance sheet, statement of income and statement of cash flows as of the end of, and for, such month, as well as a “key performance indicator” report. The Second Amendment also requires that, within 10 business days after the end of each month, the Company will provide a rolling 13-week cash flow forecast prepared on a monthly basis. The Second Amendment further provides that, upon the request of the Required Lenders (as defined in the Credit Agreement), the Company will permit a financial advisor designated by the Required Lenders to meet with management of the Company to discuss the affairs, finances, accounts and condition of the Company during the six-month period following the effective date of the Second Amendment. In addition, the Second Amendment requires the Company to deliver an updated organization chart and certain supplemental information regarding the Company’s subsidiaries in connection with each quarterly report required pursuant to the Credit Agreement.

Under the Second Amendment, the Company could have elected to borrow on each of the loan facilities at either an adjusted term secured overnight financing rate (“Term SOFR”) rate of interest or an alternate base rate of interest. Term SOFR loans accrued interest at an annual rate equal to the applicable Term SOFR rate plus (i) an adjustment percentage equal to between 0.11448% and 0.42826%, depending on the term of the loan (“Adjusted Term SOFR”); provided that, Adjusted Term SOFR could never be less than 1.00%, and (ii) a margin of between 6.00% and 6.50%, depending on the Company’s then current Secured Leverage Ratio (as defined in the Credit Agreement). Alternate base rate loans could accrue interest at an annual rate equal to (i) the highest of (a) the Federal Funds Effective Rate (as defined in the Credit Agreement) plus 0.50%, (b) the Agent’s prime rate and (c) Adjusted Term SOFR for a one-month tenor plus 1.00% (the “Second Amendment Alternate Base Rate”); provided that, the Second Amendment Alternate Base Rate could never be less than 2.00%, plus (ii) a margin of between 5.00% and 5.50%, depending on the Company’s then current Secured Leverage Ratio.

The Second Amendment also provides that the Company may not request any credit extensions under the revolving credit facility under the Credit Agreement, if any of the conditions precedent set forth in Section 4.02 of the Credit Agreement cannot be satisfied, including, without limitation, the making of the representation and warranty that as of the date of the most recent audited financial statements delivered to the Agent, no event, change, circumstance, condition, development or occurrence has had, or would reasonably be expected to result in, either individually or in the aggregate, a Material Adverse Effect (as defined in the Credit Agreement).

Third Amendment to Credit Agreement

On January 9, 2023, the Company, the Subsidiary Guarantors, the lenders party thereto, and the Agent, entered into a Third Amendment (“Third Amendment”) to the Credit Agreement. The Third Amendment provides that, among other things, during the period beginning on January 9, 2023 and, subject to the terms of the Credit Agreement, ending on the date on which financial statements for the Company’s fiscal quarter ended March 31, 2024 are delivered or are required to be delivered, as long as no event of default has occurred (the “Amendment Relief Period”):

The Third Amendment provides that from and after the date thereof, no incremental facilities under the Credit Agreement may be established or incurred. The Third Amendment also provides for additional mandatory prepayments of borrowed amounts following the receipt by the Company of certain cash receipts, including proceeds from certain equity issuances and cash received by the Company not in the ordinary course of business. Under the Third Amendment, after any draw on the revolving credit facility, the Company’s cash and cash equivalents held on hand domestically within the U.S. cannot exceed $10,000.

Under the Third Amendment, the Company may elect to borrow on each of the loan facilities accruing interest at either an adjusted Term SOFR or an alternate base rate of interest. Term SOFR loans shall accrue interest at an annual rate equal to the applicable Term SOFR rate plus (i) an adjustment percentage equal to between 0.11448% and 0.42826%, depending on the term of the loan, provided that, the Adjusted Term SOFR shall never be less than 1.00% per annum, plus (ii) an applicable margin of 6.75% per annum for term loans maintained as SOFR loans or 9.50% per annum for revolving loans maintained as SOFR loans. Alternate base rate loans shall accrue interest at an annual rate equal to (i) the highest of (a) the Federal Funds Effective Rate (as defined in the Credit Agreement) plus 0.50%, (b) the Agent’s prime rate and (c) Adjusted Term SOFR for a one-month tenor plus 1.00% (the “Alternate Base Rate”), provided that, the Alternate Base Rate is subject to a floor of 2.00% per annum plus (ii) an applicable margin of 5.75% per annum for term loans maintained as Alternate Base Rate loans or 8.50% per annum for revolving loans maintained as Alternate Base Rate loans.

The fee consideration payable by the Company for each consenting lender party to the Third Amendment is: (i) 0.50% of the aggregate outstanding principal amount of the term loans held by each consenting term loan lender, to be paid in-kind and capitalized to the principal amounts of the term loans held by such lender; (ii) 0.50% of the aggregate outstanding principal amount of the term loans held by each consenting term loan lender, to be paid in cash upon the occurrence of certain prepayments of the term loan under the Credit Agreement; and (iii) 7.00% of the aggregate amount of the revolving commitments held by each consenting revolving lender, to be paid in cash upon the occurrence with certain permanent reductions of the revolving loans under the Credit Agreement.

Fourth Amendment to Credit Agreement

under the Credit Agreement. Refer to Note 12 - Contingencies and Commitments for further discussion of the Resolution Agreement and Plea Agreement.

The fee consideration payable by the Company for each consenting lender party to the Fourth Amendment is 0.50% of the aggregate outstanding principal amount of the term loans held by each consenting term loan lender, to be paid in-kind and capitalized to the principal amounts of the term loans held by such lender.

Fifth Amendment to Credit Agreement

The fee consideration payable by the Company for each consenting lender party to the Fifth Amendment is 0.50% of the aggregate outstanding principal amount of the term loans held by each consenting term loan lender, to be paid in-kind and capitalized to the principal amounts of the term loans held by such lender.

Sixth Amendment to Credit Agreement

On August 7, 2024, the Company, the Subsidiary Guarantors and the lenders party thereto entered into a Sixth Amendment (the “Sixth Amendment”) to the Credit Agreement. The Sixth Amendment among other changes, waived the financial covenant tests set out under the Credit Agreement for the fiscal quarter ended June 30, 2024, established a new weekly liquidity reporting requirement to the lenders, and established a new minimum weekly liquidity requirement of $7,000 for each of the weeks ended August 16, 2024, August 23, 2024 and August 30, 2024, $17,500 for each of the weeks ended October 11, 2024, October 18, 2024 and October 25, 2024 and $10,000 for each other week thereafter.

Seventh Amendment to Credit Agreement

On September 13, 2024, the Company, the Subsidiary Guarantors and the lenders party thereto entered into the Seventh Amendment to the Credit Agreement. The Seventh Amendment, among other changes, permitted the incurrence of the issuance of the Second Lien Notes in an aggregate amount of $22,550, made certain changes to the component definitions of the financial covenants, including the definition of Fixed Charge Coverage Ratio, and increased the cash netting capability in the Secured Leverage Ratio covenant. The Seventh Amendment included the addition of a maximum capital expenditure limit and a minimum EBITDA test effective as of the closing date, waived the existing financial covenants from the date of the Seventh Amendment until June 30, 2025, and established new financial covenant tests for the fiscal quarters starting June 30, 2025 and thereafter. The Seventh Amendment also capped the reinvestment of funds from extraordinary receipts and asset sales and casualty events at $5,000 in the aggregate, and established a non-voting third party observer to the Company’s board of directors meetings, as elected by the lenders. Additionally, the Seventh Amendment permits charges or expenses attributable to or related to the Resolution Agreement and the Plea Agreement to be added back to the Company’s Consolidated EBITDA in an amount up to $32,000 for purposes of the financial covenants under the Credit Agreement. This is an update to the $28,500 provided in the Fifth Amendment.

Second Lien Notes

Purchase Agreement

Second Lien Indenture

The Second Lien Notes were issued pursuant to an indenture (the “Second Lien Indenture”), dated as of September 13, 2024, by and between the Company, the Subsidiary Guarantors and U.S. Bank Trust Company, National Association, as trustee (the “Second Lien Trustee”). The Second Lien Notes are the Company’s senior secured second lien obligations and are secured by substantially all of the Company’s and its subsidiaries’ assets, and are guaranteed on a senior secured second lien basis by the Subsidiary Guarantors.

Interest on the Second Lien Notes is payable in kind. The Second Lien Notes accrue interest at a rate of 15.00% per annum, payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year, with the initial payment on December 31, 2024. The Second Lien Notes will mature on February 4, 2027, unless earlier repurchased or redeemed.

The Second Lien Notes will be redeemable, in whole or in part, at the Company’s option at any time on or prior to March 13, 2026, at a cash redemption price equal to 100.00% of the principal amount of the Second Lien Notes redeemed, plus accrued and unpaid interest, plus a make-whole premium, as further described in the Second Lien Indenture. The Second Lien Notes may be redeemed on or after March 14, 2026 through and including September 13, 2026, at a redemption price of 102.00% of the principal amount of the Second Lien Notes to be redeemed and (ii) on and after September 14, 2026, at a redemption price of 100.00% of the principal amount of the Second Lien Notes to be redeemed, in each case plus accrued and unpaid interest, if any, to, but excluding, the redemption date.

As of March 31, 2025 and September 30, 2024, there were $1,322 and $1,563, respectively, in unamortized debt issuance costs related to the Second Lien Notes. For the three months ended March 31, 2025, the total interest expense was $1,521, including coupon interest expense of $981, accretion expense of $381, and amortization of debt discount and issuance costs of $159. For the six months ended March 31, 2025, the total interest expense was $3,046, including coupon interest expense of $1,989, accretion expense of $741, and amortization of debt discount and issuance costs of $316.

The Second Lien Indenture contains covenants restricting the Company’s and its subsidiaries’ ability to incur indebtedness, incur liens, make investments, make restricted payments, make asset sales and engage in transactions with affiliates, subject to certain baskets. The Second Lien Indenture requires the Company to add future assets to the collateral under the Security Agreement (as defined below) and to add future subsidiaries as guarantors under the Security Agreement.

The Second Lien Notes have customary provisions relating to the occurrence of “Events of Default” (as defined in the Second Lien Indenture), which include, among others, the following: (i) certain payment defaults on the Second Lien Notes (which, in the case of a default in the payment of interest on the Second Lien Notes, will be subject to a 30-day cure period); (ii) a default by the Company in its obligations or agreements under the Second Lien Indenture or the Second Lien Notes if such default is not cured or waived within certain grace periods; (iii) certain defaults by the Company or any of its subsidiaries with respect to indebtedness for borrowed money of at least $8,625 during the Amendment Relief Period (as defined in the Second Lien Indenture) or of at least $17,250 thereafter; (iv) certain defaults by the Company or any of its subsidiaries with respect to the Credit Agreement; (v) subject to certain exceptions, the rendering of certain judgments against the Company or any of its subsidiaries for the payment of at least $8,625 during the Amendment Relief Period or of at least $17,250 thereafter, where such judgments are not discharged or stayed within 90 days after the date on which the right to appeal has expired or on which all rights to appeal have been extinguished; (vi) the occurrence of certain ERISA events; (vii) the loss of material security interests and liens and guarantees, subject to certain exceptions; (viii) certain payment defaults in excess of $11,500 owned by the Company or any of its subsidiaries under the 2024 Settlement (as defined in the Second Lien Indenture) and other failures to perform any term, covenant, condition or agreement contained in the 2024 Settlement that is capable of being cured and that is not cured within 30 days after receipt by the Company or any of its subsidiaries of written notice of such failure; (ix) any note Document (as defined in the Second Lien Indenture) or material provision thereof being declared null and void by a court of competent jurisdiction and (x) certain events of bankruptcy, insolvency and reorganization involving the Company or any of the Company’s significant subsidiaries.

If an Event of Default involving bankruptcy, insolvency or reorganization events with respect to the Company occurs, then the principal amount of, and all accrued and unpaid interest on, all of the Second Lien Notes then outstanding will immediately become due and payable without any further action or notice by any person. If any other Event of Default occurs and is continuing, then, the Second Lien Trustee, by notice to the Company, or noteholders of at least 30.00% of the aggregate principal amount of Second Lien Notes then outstanding, by notice to the Company and the Second Lien Trustee, may declare the principal amount of, and all accrued and unpaid interest on, all of the Second Lien Notes then outstanding to be due and payable immediately.

Security Agreement

On September 13, 2024, the Company and the Subsidiary Guarantors entered into a Security Agreement (the “Security Agreement”) with U.S. Bank Trust Company, National Association, as the collateral agent for the Second Lien Notes (the “Collateral Agent”). Pursuant to the Security Agreement, the Company and Subsidiary Guarantors granted the Collateral Agent a second lien security interest in substantially all of their assets, including but not limited to certain accounts, equipment, fixtures and intellectual property, in order to secure the payment and performance of all of the Obligations, as defined in the Second Lien Indenture.

Convertible Senior Notes

On September 27, 2021, the Company issued $140,000 principal amount of the Notes. The Notes were issued pursuant to, and are governed by, an indenture, dated as of September 27, 2021, among the Company, the Company’s wholly-owned subsidiary, BAS Evansville, Inc., as guarantor (the “Guarantor”), and U.S. Bank National Association, as trustee (the “Convertible Bond Indenture”). Pursuant to the purchase agreement between the Company and the initial purchaser of the Notes, the Company granted the initial purchaser an option to purchase, for settlement within a period of 13 days from, and including, the date the Notes were first issued, up to an additional $15,000 principal amount of the Notes. The Notes issued on September 27, 2021 included $15,000 principal amount of the Notes issued pursuant to the full exercise by the initial purchaser of such option. The Company used the net proceeds from the offering of the Notes, together with borrowings under a new senior secured term loan facility, to fund the cash portion of the purchase price of the Envigo acquisition and related fees and expenses.

In connection with the Purchase Agreement, $8,333 of the Notes were cancelled by the Company under the terms of the Purchase Agreement, such that the aggregate principal amount of Notes that remains outstanding is $131,667.

The Notes are the Company’s senior, unsecured obligations and are (i) equal in right of payment with the Company’s existing and future senior, unsecured indebtedness; (ii) senior in right of payment to the Company’s existing and future indebtedness that is expressly subordinated to the Notes; (iii) effectively subordinated to the Company’s existing and future secured indebtedness, to the extent of the value of the collateral securing that indebtedness; and (iv) structurally subordinated to all existing and future indebtedness and other liabilities, including trade payables, and (to the extent the Company is not a holder thereof) preferred equity, if any, of the Company’s non-guarantor subsidiaries. The Notes are fully and unconditionally guaranteed, on a senior, unsecured basis, by the Guarantor.

The Notes accrue interest at a rate of 3.25% per annum, payable semi-annually in arrears on April 15 and October 15 of each year, beginning on April 15, 2022. The Notes will mature on October 15, 2027, unless earlier repurchased, redeemed or converted. Before April 15, 2027, noteholders have the right to convert their Notes only upon the occurrence of certain events. From and after April 15, 2027, noteholders may convert their Notes at any time at their election until the close of business on the scheduled trading day immediately before the maturity date. The Company will settle conversions by paying or delivering, as applicable, cash, its common shares or a combination of cash and its common shares, at the Company’s election. The initial conversion rate is 21.7162 common shares per $1 principal amount of Notes, which represents an initial conversion price of approximately $46.05 per common share. The conversion rate and conversion price are subject to customary adjustments upon the occurrence of certain events. In addition, if certain corporate events that constitute a “Make-Whole Fundamental Change” (as defined in the Convertible Bond Indenture) occur, then the conversion rate will, in certain circumstances, be increased for a specified period of time.

The Notes are redeemable, in whole and not in part, at the Company’s option at any time on or after October 15, 2024 and on or before the 40th scheduled trading day immediately before the maturity date, but only if the last reported sale price per common share of the Company exceeds 130.00% of the conversion price on (i) each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date the Company sends the related redemption notice; and (ii) the trading day immediately before the date the Company sends such notice. The redemption price is a cash amount equal to the principal amount of the Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. In addition, calling the Notes for redemption pursuant to the provisions described in this paragraph will constitute a Make-Whole Fundamental Change, which will result in an increase to the conversion rate in certain circumstances for a specified period of time.

The Notes have customary provisions relating to the occurrence of “Events of Default” (as defined in the Convertible Bond Indenture), which include the following: (i) certain payment defaults on the Notes (which, in the case of a default in the payment of interest on the Notes, are subject to a 30-day cure period); (ii) the Company’s failure to send certain notices under the Convertible Bond Indenture within specified periods of time; (iii) the failure by the Company or the Guarantor to comply with certain covenants in the Convertible Bond Indenture relating to the ability of the Company or the Guarantor to consolidate with or merge with or into, or sell, lease or otherwise transfer, in one transaction or a series of transactions, all or substantially all of the assets of the Company or the Guarantor, as applicable, and its subsidiaries, taken as a whole, to another person; (iv) a default by the Company or the Guarantor in its other obligations or agreements under the Convertible Bond Indenture or the Notes if such default is not cured or waived within 60 days after notice is given in accordance with the Convertible Bond Indenture; (v) certain defaults by the Company, the Guarantor or any of their respective subsidiaries with respect to indebtedness for borrowed money of at least $20,000; (vi) the rendering of certain judgments against the Company, the Guarantor or any of their respective subsidiaries for the payment of at least $20,000, where such judgments are not discharged or stayed within 60 days after the date on which the right to appeal has expired or on which all rights to appeal have been extinguished; (vii) certain events of bankruptcy, insolvency and reorganization involving the Company, the Guarantor or any of their respective significant subsidiaries; and (viii) the guarantee of the Notes ceases to be in full force and effect (except as permitted by the Convertible Bond Indenture) or the Guarantor denies or disaffirms its obligations under its guarantee of the Notes.

If an Event of Default involving bankruptcy, insolvency or reorganization events with respect to the Company or the Guarantor (and not solely with respect to a significant subsidiary of the Company or the Guarantor) occurs, then the principal amount of, and all accrued and unpaid interest on, all of the Notes then outstanding will immediately become due and payable without any further action or notice by any person. If any other Event of Default occurs and is continuing, then the trustee, by notice to the Company, or noteholders of at least 25.00% of the aggregate principal amount of Notes then outstanding, by notice to the Company and the trustee, may declare the principal amount of, and all accrued and unpaid interest on, all of the Notes then outstanding to become due and payable immediately. However, notwithstanding the foregoing, the Company may elect, at its option, that the sole remedy for an Event of Default relating to certain failures by the Company to comply with certain reporting covenants in the Convertible Bond Indenture consists exclusively of the right of the noteholders to receive special interest on the Notes for up to 180 days at a specified rate per annum not exceeding 0.50% on the principal amount of the Notes.

At issuance, the Company evaluated the convertible feature of the Notes and determined it was required to be bifurcated as an embedded derivative and did not qualify for equity classification. In subsequent periods, the Notes conversion rights met all equity classification criteria and the fair value of the embedded derivative was reclassified to additional paid-in-capital. The discount resulting from the initial fair value of the embedded derivative has and will continue to be amortized to interest expense using the effective interest method. Non-cash interest expense during the period primarily related to this discount.

Acquisition-related Debt (Seller Notes)

In addition to the indebtedness described above, certain of the Company’s subsidiaries have issued unsecured notes as partial payment of the purchase prices of certain acquisitions as described herein. Each of these notes is subordinated to the indebtedness under the Credit Agreement.

As part of the acquisition of Bolder BioPATH, the Company issued unsecured subordinated promissory notes payable to the former shareholders of Bolder BioPATH in an aggregate principal amount of $1,500. As part of the working capital adjustment in March 2022, a reduction of the promissory note of $470 was recorded. The promissory notes bear interest at a rate of 4.50% per annum, with monthly payments of principal and interest and a maturity date of May 1, 2026.

As part of the acquisition of Pre-Clinical Research Services, Inc. ("PCRS"), the Company issued an unsecured subordinated promissory note payable to the PCRS seller in the initial principal amount of $800. The promissory note bears interest at a rate of 4.50% per annum with monthly payments of principal and interest and a maturity date of December 1, 2024. The promissory note was paid in full as of December 1, 2024.

5.    SUPPLEMENTAL BALANCE SHEET INFORMATION