Quarterly report pursuant to Section 13 or 15(d)

Debt - Summary of Long-term debt (Details)

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Debt - Summary of Long-term debt (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Finance leases [1] $ 6,873 $ 4,988
Unamortized deferred issuance costs (2,530) (2,664)
Unamortized discount on debt (121,870) (128,367)
Total debt 192,260 182,773
Current portion of long-term debt 12,839 11,740
Long-term debt $ 179,421 171,033
PIPE Investment Obligation    
Debt Instrument [Line Items]    
Issued March 2022  
Maturity December 2025  
Convertible Debt $ 15,000 16,875
Equipment Financings    
Debt Instrument [Line Items]    
Long-term debt, gross [2] $ 2,182 2,287
Equipment Financings | Minimum    
Debt Instrument [Line Items]    
Interest Rate 6.25%  
Equipment Financings | Maximum    
Debt Instrument [Line Items]    
Interest Rate 20.05%  
Convertible Notes due 2027    
Debt Instrument [Line Items]    
Issued October 2022  
Maturity October 2027  
Interest Rate 10.00%  
Interest Payable Quarterly  
Long-term debt, gross $ 115,041 112,251
Lockheed Martin Rollover Debt    
Debt Instrument [Line Items]    
Issued March 2021  
Maturity April 2026  
Interest Rate 9.25%  
Interest Payable Quarterly  
Long-term debt, gross $ 25,000 25,000
Beach Point Rollover Debt    
Debt Instrument [Line Items]    
Issued March 2021  
Maturity April 2026  
Interest Rate 11.25%  
Interest Payable Quarterly  
Long-term debt, gross $ 32,541 32,380
Francisco Partners Note Purchase Agreement    
Debt Instrument [Line Items]    
Issued November 2021  
Maturity April 2026  
Interest Rate 9.25%  
Interest Payable Quarterly  
Long-term debt, gross $ 120,023 $ 120,023
[1] Refer to Note 14 “Leases” for further discussion.
[2] Consists of equipment financing debt agreements with maturities through September 2030, annual interest rates ranging from 6.25% to 20.05%, and requiring monthly payments of interest and principal.