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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities    
Net loss $ (38,847) $ (41,447)
Adjustments to reconcile net loss to net cash flows used in operating activities:    
Restructuring and impairment charges 0 6,530
Depreciation and amortization 4,135 4,304
Non-cash lease expense on right-of-use assets 2,325 1,483
Recognition of deferred income from state and local incentives (2,507) (2,215)
(Gain) loss on change in fair market value for Warrant liability (1,486) 14,894
Impairment on leased railcars 4,515 158
Loss on pension settlement 8,105 0
Stock-based compensation recognized 2,106 2,977
Non-cash interest expense 16,563 5,502
Gain on extinguishment of debt 0 (10,122)
Other non-cash items, net 20 529
Changes in operating assets and liabilities, net of acquisitions:    
Accounts receivable 0 150
VAT receivable 24,946 24,675
Inventories (8,476) (12,369)
Related party asset, net (58) (624)
Accounts and contractual payables 8,181 7,878
Lease liability (3,006) (2,106)
Other assets and liabilities (5,013) (5,944)
Net cash flows used in operating activities 11,503 (55,397)
Cash flows from investing activities    
Maturity of restricted certificates of deposit 0 182
Purchase of property, plant and equipment (7,816) (2,290)
Proceeds from sale of property, plant and equipment 0 433
Net cash flows used in investing activities (7,816) (1,675)
Cash flows from financing activities    
Proceeds from issuance of long-term debt 0 16,000
Deferred financing costs 0 (1,688)
Borrowings on revolving line of credit 133,652 48,400
Repayments on revolving line of credit (124,852) (33,378)
Employee stock settlement (57) (12)
Payment for stock appreciation rights exercised (20) (57)
Financing lease payments (738) 0
Net cash flows provided by financing activities 7,985 29,265
Net increase (decrease) in cash and cash equivalents 11,672 (27,807)
Cash, cash equivalents and restricted cash equivalents at beginning of year 26,240 54,047
Cash, cash equivalents and restricted cash equivalents at end of year 37,912 26,240
Supplemental cash flow information    
Interest paid 8,849 6,537
Income tax refunds received, net of payments 0 5
Non-cash transactions    
Change in unpaid construction in process 715 122
Accrued PIK interest paid through issuance of PIK Note 1,467 1,278
Issuance of warrants 8,560 4,891
Issuance Of Equity Fee $ 4,000 $ 2,000