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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities    
Net loss $ (23,589) $ (38,847)
Adjustments to reconcile net loss to net cash flows used in operating activities:    
Depreciation and amortization 4,606 4,135
Non-cash lease expense on right-of-use assets 2,742 2,325
Recognition of deferred income from state and local incentives 0 (2,507)
Loss (gain) on change in fair market value for Warrant liability 2,229 (1,486)
Impairment on leased railcars 4,091 4,515
Loss on pension settlement 313 8,105
Stock-based compensation recognized 1,240 2,106
Non-cash interest expense 10,116 16,563
Gain on extinguishment of debt 14,880 0
Other non-cash items, net 138 20
Changes in operating assets and liabilities:    
Accounts receivable 3,163 0
VAT receivable 1,426 24,946
Inventories (60,912) (8,476)
Accounts and contractual payables 39,943 8,181
Lease liability (3,150) (3,006)
Other assets and liabilities 7,533 (5,071)
Net cash flows provided by operating activities 4,769 11,503
Cash flows from investing activities    
Purchase of property, plant and equipment (12,722) (7,816)
Proceeds from sale of property, plant and equipment 8,356 0
Net cash flows used in investing activities (4,366) (7,816)
Cash flows from financing activities    
Proceeds from issuance of long-term debt 13,254 0
Deferred financing costs (353) 0
Borrowings on revolving line of credit 149,811 133,652
Repayments on revolving line of credit (159,348) (124,852)
Employee stock settlement (106) (57)
Payment for stock appreciation rights exercised (6) (20)
Financing lease payments (1,007) (738)
Net cash flows provided by financing activities 2,245 7,985
Net increase in cash and cash equivalents 2,648 11,672
Cash, cash equivalents and restricted cash equivalents at beginning of year 37,912 26,240
Cash, cash equivalents and restricted cash equivalents at end of year 40,560 37,912
Supplemental cash flow information    
Interest paid 4,915 8,849
Income taxes paid 2,097 1,218
Non-cash transactions    
Change in unpaid construction in process 438 715
Accrued PIK interest paid through issuance of PIK Note 3,161 1,467
Issuance of preferred shares in exchange of term loan 72,688 0
Issuance of warrants 3,014 8,560
Issuance Of Equity Fee $ 685 $ 4,000