Long-term debt consisted of the following (in thousands):


March 31, 2024
Description	Maturity Date	Convertible Debt Coupon Rate	Effective Interest Rate	Principal		Unamortized Discount			Deferred Issuance Costs			Carrying Value
2025 Modified Notes	6/1/2025	3.00%	3.70%	$	87,500	$	-		$	(701	)	$	86,799
2025 Modified Notes	7/1/2028	1.50%	8.65%		87,500		(3,294	)		(12,574	)		71,632
2028 Notes	7/1/2028	1.50%	1.91%		122,500		-			(2,041	)		120,459
Total debt				$	297,500	$	(3,294	)	$	(15,316	)		278,890
Less: current portion of long-term debt													—
Total long-term debt												$	278,890


September 30, 2023
Description	Maturity Date	Convertible Debt Coupon Rate	Effective Interest Rate	Principal		Unamortized Discount			Deferred Issuance Costs			Carrying Value
2025 Modified Notes	6/1/2025	3.00%	3.70%	$	87,500	$	-		$	(992	)	$	86,508
2025 Modified Notes	7/1/2028	1.50%	8.75%		87,500		(3,796	)		(14,490	)		69,214
2028 Notes	7/1/2028	1.50%	1.91%		122,500		-			(2,271	)		120,229
Total debt				$	297,500	$	(3,796	)	$	(17,753	)		275,951
Less: current portion of long-term debt													—
Total long-term debt												$	275,951

The following table summarizes the maturities of our borrowing obligations as of March 31, 2024 (in thousands):


Fiscal Year	2028 Notes			2025 Modified Notes			Total
2024	$	—		$	—		$	—
2025		—			87,500			87,500
2026		—			—			—
2027		—			—			—
2028		122,500			87,500			210,000
Thereafter		—			—			—
Total before unamortized discount and issuance costs and current portion	$	122,500		$	175,000		$	297,500
Less: unamortized discount and issuance costs		(2,041	)		(16,569	)		(18,610	)
Less: current portion of long-term debt		—			—			—
Total long-term debt	$	120,459		$	158,431		$	278,890

On June 26, 2023, we issued $190.0 million in aggregate principal amount of 1.50% Convertible Senior Notes due 2028 (the “2028 Notes”), which are governed by an indenture (the “2028 Indenture”), between us and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”), in a private offering to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”). On July 3, 2023, we issued an additional $20.0 million in aggregate principal amount of 2028 Notes. The initial net proceeds from the issuance of the 2028 Notes were $193.2 million after deducting transaction costs.

The 2028 Notes are senior, unsecured obligations and accrue interest payable semiannually in arrears on January 1 and July 1 of each year at a rate of 1.50% per year. The 2028 Notes will mature on July 1, 2028, unless earlier converted, redeemed, or

repurchased. The 2028 Notes are convertible into cash, shares of our common stock or a combination of cash and shares of our common stock, at our election.

A holder of 2028 Notes may convert all or any portion of its 2028 Notes at its option at any time prior to the close of business on the business day immediately preceding April 3, 2028 only under the following circumstances: (1) during any fiscal quarter commencing after the fiscal quarter ending on September 30, 2023 (and only during such fiscal quarter), if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any ten consecutive trading day period (the “measurement period”) in which the “trading price” (as defined in the 2028 Indenture) per $1,000 principal amount of 2028 Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate on each such trading day; (3) if we call such 2028 Notes for redemption, at any time prior to the close of business on the business day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after April 3, 2028 until the close of business on the second scheduled trading day immediately preceding the maturity date, a holder may convert all or any portion of its 2028 Notes at any time, regardless of the foregoing circumstances.

The conversion rate is 24.5586 shares of our common stock per $1,000 principal amount of 2028 Notes (equivalent to an initial conversion price of approximately $40.72 per share of our common stock). The conversion rate is subject to adjustment in some events but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date or if we deliver a notice of redemption, we will, in certain circumstances, increase the conversion rate for a holder who elects to convert its 2028 Notes in connection with such a corporate event or convert its 2028 Notes called for redemption in connection with such notice of redemption, as the case may be.

We may not redeem the 2028 Notes prior to July 6, 2026. We may redeem for cash all or any portion of the 2028 Notes (subject to certain limitations), at our option, on a redemption date occurring on or after July 6, 2026 and on or before the 31st scheduled trading day immediately before the maturity date, if the last reported sale price of our common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive), including the trading day immediately preceding the date on which we provide notice of redemption, during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the 2028 Notes.

If we undergo a “fundamental change”, subject to certain conditions, holders may require us to repurchase for cash all or any portion of their 2028 Notes at a fundamental change repurchase price equal to 100% of the principal amount of the 2028 Notes to be repurchased, plus any accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

The 2028 Indenture contains customary terms and covenants, including that upon certain events of default occurring and continuing, either the Trustee or the holders of not less than 25% in aggregate principal amount of the 2028 Notes then outstanding may declare the entire principal amount of all the 2028 Notes plus accrued special interest, if any, to be immediately due and payable.

In connection with the offering of the 2028 Notes, we repurchased $87.5 million in aggregate principal amount of the 2025 Notes in a privately negotiated transaction. We specifically negotiated the repurchase of the 2025 Notes with investors who concurrently purchased the 2028 Notes. We evaluated the transaction to determine whether the exchange should be accounted for as a modification or extinguishment under the provisions of ASC 470-50, which allows for an exchange of debt instruments between the same debtor and creditor to be accounted for as a modification so long as the instruments do not have substantially different terms. Because the concurrent redemption of the 2025 Notes and a portion of issuance of the 2028 Notes were executed with the same investors, we evaluated the transaction as a debt modification, on a creditor by creditor basis. The repurchase of the 2025 Notes and issuance of the 2028 Notes were deemed to not have substantially different terms on the basis that (1) the present value of the cash flows under the terms of the new debt instrument were less than 10% different from the present value of the remaining cash flows under the terms of the original instrument and (2) the fair value of the conversion feature did not change by more than 10% of the carrying value of the 2025 Notes, and therefore, the repurchase of the 2025 Notes was accounted for as a debt modification.

As a result, $87.5 million of the 2028 Notes are considered a modification of the 2025 Notes and are included in the balances of the 2025 Notes along with the remaining $87.5 million of the 2025 Notes (together the “2025 Modified Notes” and together with the 2028 Notes, the “Notes”) that were not repurchased as part of the transaction. We recorded $14.3 million of fees paid directly to the lenders as deferred debt issuance costs, and $3.8 million of fees paid to third-parties were expensed in the period. As of March 31, 2024, the carrying amount of the 2025 Modified Notes was $158.4 million, net of unamortized costs of $16.6 million.

If a convertible debt instrument is modified or exchanged in a transaction that is not accounted for as an extinguishment, an increase in the fair value of the embedded conversion option shall reduce the carrying amount of the debt instrument with a corresponding increase in Additional paid-in capital. We recognized the increase in the fair value of the embedded conversion feature of $4.1 million as Additional paid-in capital and an equivalent discount that reduced the carrying value of the 2025 Modified Notes.

We accounted for $122.5 million of the 2028 Notes, that were not negotiated with the investors of the 2025 Notes, as a single liability. We incurred transaction costs of $2.4 million relating to the issuance of the 2028 Notes, which were recorded as a direct deduction from the face amount of the 2028 Notes and are being amortized as interest expense over the term of the 2028 Notes using the interest method. As of March 31, 2024, the carrying amount of the 2028 Notes was $120.5 million and unamortized issuance costs of $2.0 million. As of March 31, 2024, the 2028 Notes were not convertible. As of March 31, 2024 and September 30, 2023, the if-converted value of the 2028 Notes was $75.1 million and $61.2 million, respectively, less than its principal amount.

On June 2, 2020, we issued $175.0 million in aggregate principal amount of 3.00% Convertible Senior Notes due 2025 (the “2025 Notes”), including the initial purchasers’ exercise in full of their option to purchase $25.0 million principal amount of the 2025 Notes, which are governed by an indenture (the “2025 Indenture”), between us and the Trustee, in a private offering to qualified institutional buyers pursuant to Rule 144A under the Securities Act. The net proceeds from the issuance of the 2025 Notes were $169.8 million after deducting transaction costs.

The 2025 Notes are senior, unsecured obligations and accrue interest payable semiannually in arrears on June 1 and December 1 of each year at a rate of 3.00% per year. The 2025 Notes will mature on June 1, 2025, unless earlier converted, redeemed, or repurchased. The 2025 Notes are convertible into cash, shares of our common stock or a combination of cash and shares of our common stock, at our election. As of March 31, 2024 and September 30, 2023, the if-converted value of the 2025 Modified Notes was $104.3 million and $83.6 million, respectively, less than its principal amount.

A holder of 2025 Notes may convert all or any portion of its 2025 Notes at its option at any time prior to the close of business on the business day immediately preceding March 1, 2025 only under the following circumstances: (1) during any fiscal quarter commencing after the fiscal quarter ending on September 30, 2020 (and only during such fiscal quarter), if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any ten consecutive trading day period (the “measurement period”) in which the “trading price” (as defined in the 2025 Indenture) per $1,000 principal amount of 2025 Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate on each such trading day; (3) if we call such 2025 Notes for redemption, at any time prior to the close of business on the business day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after March 1, 2025 until the close of business on the second scheduled trading day immediately preceding the maturity date, a holder may convert all or any portion of its 2025 Notes at any time, regardless of the foregoing circumstances.

The conversion rate is 26.7271 shares of our common stock per $1,000 principal amount of 2025 Notes (equivalent to an initial conversion price of approximately $37.42 per share of our common stock). The conversion rate is subject to adjustment in some events but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date or if we deliver a notice of redemption, we will, in certain circumstances, increase the conversion rate for a holder who elects to convert its 2025 Notes in connection with such a corporate event or convert its 2025 Notes called for redemption in connection with such notice of redemption, as the case may be.

We may not redeem the 2025 Notes prior to June 5, 2023. We may redeem for cash all or any portion of the 2025 Notes, at our option, on a redemption date occurring on or after June 5, 2023 and on or before the 31st scheduled trading day immediately before the maturity date, if the last reported sale price of our common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive), including the trading day immediately preceding the date on which we provide notice of redemption, during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the 2025 Notes.

See “1.50% Senior Convertible Notes due 2028” section above for discussion on modification of the 2025 Notes as part of the offering of the 2028 Notes.

The interest expense recognized related to the Notes for the three and six months ended March 31, 2024 and 2023 was as follows (dollars in thousands):


	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Contractual interest expense	$	1,439	$	1,294	$	2,881	$	2,616
Amortization of debt discount		251		-		502		-
Amortization of issuance costs		1,219		276		2,436		556
Total interest expense related to the Notes	$	2,909	$	1,570	$	5,819	$	3,172

The conditional conversion feature of the Notes was not triggered during the three and six months ended March 31, 2024. As of March 31, 2024, the Notes were not convertible. As of this Quarterly Report, no Notes have been converted by the holders. Whether any of the Notes will be converted in future quarters will depend on the satisfaction of one or more of the conversion conditions in the future. If one or more holders elect to convert their Notes at a time when any such Notes are convertible, unless we elect to satisfy our conversion obligation by delivering solely shares of our common stock (other than paying cash in lieu of delivering any fractional shares), we would be required to settle a portion or all of our conversion obligation through the payment of cash, which could adversely affect our liquidity.

On June 12, 2020 (the “Financing Closing Date”), we entered into a Credit Agreement, by and among the Borrower, the lenders and issuing banks party thereto and Wells Fargo Bank, N.A., as administrative agent (the “Credit Agreement”), consisting of a four-year senior secured term loan facility in the aggregate principal amount of $125.0 million (the “Term Loan Facility”). The net proceeds from the issuance of the Term Loan Facility were $123.0 million. We also entered into a senior secured first-lien revolving credit facility in an aggregate principal amount of $50.0 million (the “Revolving Facility” and, together with the Term Loan Facility, the “Senior Credit Facilities”), which may be drawn on in the event that our working capital and other cash needs are not supported by our operating cash flow. In connection with the issuance of the 2028 Notes, in the third quarter of fiscal year 2023, we borrowed $24.7 million under our Revolving Facility and paid $106.3 million towards our Term Loan Facility. As a result, we recorded $104.9 million extinguishment of debt and $1.3 million loss on the extinguishment of debt. All principal and interest on the Term Loan Facility have been paid in full. As of March 31, 2024 and September 30, 2023, there were no amounts outstanding under the Revolver Facility.

The Credit Agreement contains certain affirmative and negative covenants customary for financings of this type that, among other things, limit our and our subsidiaries’ ability to incur additional indebtedness or liens, to dispose of assets, to make certain fundamental changes, to designate subsidiaries as unrestricted, to make certain investments, to prepay certain indebtedness and to pay dividends, or to make other distributions or redemptions/repurchases, in respect of our and our subsidiaries’ equity interests. In addition, the Credit Agreement contains financial covenants, each tested quarterly, (1) a net secured leverage ratio of not greater than 3.25 to 1.00; (2) a net total leverage ratio of not greater than 4.25 to 1.00; and (3) minimum liquidity of at least $75 million. The Credit Agreement also contains events of default customary for financings of this type, including certain customary change of control events.

On November 22, 2022 (the “Amendment No. 2 Effective Date”), we entered into Amendment No. 2 to the Credit Agreement (“Amendment No. 2”). Amendment No. 2 modified certain financial covenants between the fiscal quarter ended March 31, 2023 to the fiscal quarter ended December 31, 2023 (the "covenant adjustment period"). During the covenant adjustment period, each tested quarterly, we are required to maintain (1) a net secured leveraged ratio of not greater than 4.25 to 1.00; (2) minimum liquidity of at least $125 million; and (3) aggregate capital expenditures less than $7.5 million. The net total leverage ratio was waived during the covenant adjustment period. At the conclusion of the covenant adjustment period, the original financial covenants resumed. As of March 31, 2024 and September 30, 2023, we were in compliance with all Credit Agreement covenants.

On April 12, 2024 (the “Amendment No. 3 Effective Date”), we entered into Amendment No. 3 to the Credit Agreement (“Amendment No. 3”). Amendment No. 3 modified certain financial covenants. Tested quarterly, we will be required to maintain (i) a net secured leveraged ratio of not greater than 3.00 to 1.00; (ii) a minimum level of EBITDA (as defined in the Credit Agreement) of not less than (A) negative $5 million for the six month period ending June 30, 2024, (B) $7.5 million for the nine month period ending September 30, 2024, (C) $20 million for the four consecutive fiscal quarters ending December 31, 2024, (D) $30 million for the four consecutive fiscal quarters ending March 31, 2025, (E) $35 million for the four consecutive fiscal quarters ending June 30, 2025 and for the four consecutive fiscal quarters ending September 30, 2025, (F) $40 million for the four consecutive fiscal quarters ending December 31, 2025, and (G) $40 million for the four consecutive fiscal quarters ending March 31, 2026; (iii) minimum liquidity of at least $50 million; and (iv) aggregate capital expenditures of not more than $10 million.

Amendment No. 3 revised certain interest rates in the Credit Agreement. The applicable margin is SOFR plus 3.00% for SOFR loans and the highest of (i) the federal funds effective rate, (ii) the prime rate, and (iii) one-month SOFR plus 1.00% (the highest of clauses (i) through (iii), the “ABR”) plus 2.00% for ABR loans.

Amendment No. 3 also modified the maturity date for the Revolving Facility. The Revolving Facility matures on April 1, 2026, provided that if on any date during the period commencing on the date which is 91 days prior to the maturity date of our 2025 Notes and any indebtedness incurred to refinance such notes that matures on or prior to July 1, 2026 (such debt, the “Early Maturity Debt”), and ending on July 1, 2026, the maturity date of such Early Maturity Debt has not been extended to a date after July 1, 2026 and we do not hold in a segregated deposit account an amount of cash sufficient to repay and discharge the principal amount of the Early Maturity Debt at maturity, then the Revolving Facility shall mature on the date that is 91 days prior to the maturity date of the Early Maturity Debt.

Total interest expense relating to the Senior Credit Facilities for the three months ended March 31, 2024 and 2023 was $0.1 million and $2.3 million, respectively, and $0.1 million and $4.2 million for the six months ended March 31, 2024 and 2023, respectively. Amounts reflect the coupon and accretion of the discount.