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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Operating activities:    
Net loss $ (46,420) $ (107,758)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Share-based compensation 7,660 6,410
Depreciation 6,933 5,535
Debt related fees and amortization expense 6,524 7,363
Intangibles and other amortization expense 72 46
Accretion and other expenses of Series A preferred units 25,313 9,888
Warrants issued for working capital agreement 409 0
Loss on asset disposals 0 47
Loss on debt extinguishment 0 49,386
Gain on litigation 0 (1,400)
Loss on lease termination 0 736
Deferred tax (benefit) expense (750) 832
Changes in operating assets and liabilities:    
Accounts receivable (7,422) 294
Inventories (13,843) 360
Prepaid expenses 1,838 1,777
Other assets (2,016) (3,941)
Accounts payable 13,726 2,183
Accrued interest expense and fees 23,558 15,501
Other liabilities (1,757) (10,125)
Net cash provided by (used in) operating activities 13,825 (22,866)
Investing activities:    
Capital expenditures (33,119) (39,157)
Grant proceeds received for capital expenditures 9,432 7,851
Net cash used in investing activities (23,687) (31,306)
Financing activities:    
Proceeds from borrowings 75,482 69,356
Repayments of borrowings (56,130) (26,266)
Lender debt renewal and waiver fee payments (1,681) (1,169)
Payments on Series A preferred financing (30,000) 0
Payments on finance leases (428) (481)
Proceeds from issuance of common stock in equity offering 21,718 11,987
Proceeds from the exercise of stock options 133 206
Net cash provided by financing activities 9,094 53,633
Effect of exchange rate changes on cash and cash equivalents 49 (213)
Net change in cash and cash equivalents for period (719) (752)
Cash, cash equivalents, and restricted cash at beginning of period 6,999 7,751
Cash, cash equivalents, and restricted cash at end of period 6,280 6,999
Supplemental disclosures of cash flow information, cash paid:    
Cash paid for interest 9,813 19,515
Income taxes paid 20 10
Supplemental disclosures of cash flow information, non-cash transactions:    
Subordinated debt extension fees added to debt 680 680
Debt fees added to revolving lines 0 800
Fair value of warrants issued to subordinated debt holders 1,278 1,939
Fair value of stock issued to a related party for guarantee fees 0 2,012
Fair value of warrants issued to lender for debt issuance costs 318 3,158
Fair value of stock issued to lender 0 1,335
Lender debt extension, waiver, and other fees added to debt 0 583
Capital expenditures in accounts payable 7,900 15,411
Payment of debt added to revolving lines 0 16,266
Operating lease liabilities arising from obtaining right of use assets 0 306
Financing lease liabilities arising from obtaining right of use assets 0 2,932
Capital expenditures purchased on financing $ 0 $ 290