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Debt
 9 Months Ended
Sep. 30, 2023
Debt Disclosure [Abstract]  
Debt Debt
Notes payable and lines of credit as of September 30, 2023 and December 31, 2022 consisted of the following (in thousands): 
September 30, 2023December 31, 2022
2025 Notes$134,208 $256,970 
Unamortized debt discount(5,785)(15,314)
Debt issuance cost(1,420)(3,759)
Credit Facility— — 
Other debt2,610 2,013 
Total debt129,613 239,910 
Less: current portion(1,076)(782)
Long-term debt, net of current portion$128,537 $239,128 
2025 Notes
In August 2020, we exchanged $315.5 million principal amount of our previous 6.25% unsecured notes due 2021 for new 9.00% convertible secured notes due August 2025 (the “2025 Notes”). The 2025 Notes pay interest at the rate of 9.00%, of which 6.25% is payable in cash and 2.75% is payable in cash or additional notes, at the Company’s option. The 2025 Notes are secured by a first lien on substantially all of the Company’s assets, except for Credit Facility priority collateral, which secures the 2025 Notes on a second lien basis. During the nine months ended September 30, 2023, $122.8 million or 48% of the principal amount of the 2025 Notes mandatorily converted into approximately 4.5 million shares of common stock.
Credit Facility
Our senior secured revolving credit facility (“Credit Facility”), which has a maturity date of September 2026, provides revolving credit commitments of $179.0 million (with a sublimit of up to $70.0 million available for the issuance of letters of credit for the account of the Company and certain of its domestic subsidiaries) (the “U.S. Line”), of which up to $20.0 million is available to certain of our Canadian subsidiaries for loans in U.S. or Canadian dollars (with a sublimit of up to $3.0 million available for the issuance of letters of credit for the account of our Canadian subsidiaries) (the “Canadian Line”).
Availability under the Credit Facility is subject to a borrowing base calculated by reference to eligible accounts receivable in the U.S., Canada and certain other jurisdictions (subject to a cap) and eligible inventory in the U.S. and Canada. Such eligible accounts receivable and eligible inventory serve as priority collateral for the Credit Facility, which is also secured on a second lien basis by substantially all of the Company's other assets. The amount of eligible inventory included in the borrowing base is restricted to the lesser of $124.0 million (subject to a quarterly reduction of $0.5 million) and 80.0% of the total borrowing base. Our borrowing capacity under the Credit Facility could be reduced or eliminated, depending on future fluctuations in our receivables and inventory. As of September 30, 2023, our total borrowing base was $173.3 million, of which no amount was drawn and $18.5 million was used for security of outstanding letters of credit, resulting in remaining availability of $154.8 million.
Borrowings under the U.S. Line are subject to an interest rate equal to, at the Company's option, either (a) the SOFR, subject to a floor of 0.00%, plus a margin of 2.25% to 2.75%, or (b) a base rate plus a margin of 1.25% to 1.75%, in each case based upon the Company's quarterly total net leverage ratio, with the U.S. Line base rate determined by reference to the greatest of (i) the federal funds rate plus 0.50% per annum, (ii) the one-month adjusted SOFR plus 1.00% per annum, and (iii) the rate of interest announced, from time to time, by Wells Fargo at its principal office in San Francisco as its prime rate, subject to a floor of 0.00%.
Borrowings under the Canadian Line were subject to an interest rate during the reporting period equal to, our subsidiary's option, either (a) the Canadian Dollar Offered Rate (“CDOR”), subject to a floor of 0.00%, plus a margin of 2.25% to 2.75%, or (b) a base rate plus a margin of 1.25% to 1.75%, in each case based upon the Company's quarterly net leverage ratio. The Canadian line base rate is determined by reference to the greater of (i) the one-month CDOR plus 1.00% and (ii) the prime rate for Canadian dollar commercial loans made in Canada as reported by Thomson Reuters, subject to a floor of 0.00%.
The weighted average interest rate under the Credit Facility was approximately 8.28% for the nine months ended September 30, 2023.
The Credit Facility also provides for a commitment fee in the amount of (a) 0.375% on the unused portion of commitments if average usage of the Credit Facility is greater than 50% and (b) 0.500% on the unused portion of commitments if average usage of the Credit Facility is less than or equal to 50%.
If excess availability under the Credit Facility falls below the greater of 12.5% of the borrowing base and $22.4 million, we will be required to maintain a fixed charge coverage ratio of at least 1.00:1.00 as of the end of each fiscal quarter until excess availability under the Credit Facility exceeds such thresholds for at least 60 consecutive days. Furthermore, the Credit Facility includes an obligation to prepay outstanding loans with cash on hand in excess of certain thresholds and includes a cross-default to the 2025 Notes.
Deferred Loan Costs
We have incurred loan costs that have been deferred and are amortized to interest expense over the term of the 2025 Notes and the Credit Facility. In connection with the September 2021 Credit Facility amendment, we deferred approximately $1.6 million of loan costs that will be amortized over the facility's remaining life.
Other Debt
Other debt consists primarily of various finance leases of equipment.
Letters of Credit and Guarantees
We execute letters of credit in the normal course of business to secure the delivery of product from specific vendors and also to guarantee our fulfillment of performance obligations relating to certain large contracts. The Company had $18.5 million and $21.8 million in total outstanding letters of credit as of September 30, 2023 and December 31, 2022, respectively.