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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities    
Net loss $ (41,447) $ (86,098)
Adjustments to reconcile net loss to net cash flows used in operating activities:    
Restructuring and impairment charges 6,530 18,325
Depreciation and amortization 4,304 9,202
Non-cash lease expense on right-of-use assets 1,483 7,063
Recognition of deferred income from state and local incentives (2,215) (2,219)
Loss on change in fair market value of warrant liability 14,894 3,657
Impairment on leased railcars 158 18,951
Stock-based compensation recognized 2,977 1,034
Non-cash interest expense 5,502 1,023
Gain on extinguishment of debt (10,122) 0
Other non-cash items, net 529 4,192
Changes in operating assets and liabilities, net of acquisitions:    
Accounts receivable (150) (2,430)
VAT receivable (24,675) (4,462)
Inventories (12,369) (17,942)
Other assets (674) 1,763
Related party asset, net (624) 813
Accounts and contractual payables 7,878 3,162
Accrued payroll and employee benefits 487 (2,027)
Income taxes payable 349 1,127
Accrued warranty (2,683) (3,172)
Lease liability (2,106) (11,553)
Customer deposits (1,051) (772)
Other liabilities (1,571) 1,812
Accrued pension costs and accrued postretirement benefits (801) (354)
Net cash flows used in operating activities (55,397) (58,905)
Cash flows from investing activities    
Purchase of restricted certificates of deposit 0 (4,219)
Maturity of restricted certificates of deposit 182 7,806
Purchase of property, plant and equipment (2,290) (9,849)
Proceeds from sale of property, plant and equipment and railcars available for lease 433 170
Net cash flows used in investing activities (1,675) (6,092)
Cash flows from financing activities    
Proceeds from issuance of long-term debt 16,000 50,000
Deferred financing costs (1,688) (3,811)
Borrowings on revolving line of credit 48,400 6,874
Repayments on revolving line of credit (33,378) (95)
Cash paid to acquire JV non-controlling interest 0 (172)
Employee stock settlement (12) (9)
Payment for stock appreciation rights exercised (57)
Net cash flows provided by financing activities 29,265 52,787
Net decrease in cash and cash equivalents (27,807) (12,210)
Cash, cash equivalents and restricted cash equivalents at beginning of year 54,047 66,257
Cash, cash equivalents and restricted cash equivalents at end of year 26,240 54,047
Supplemental cash flow information    
Interest paid 6,537 421
Income tax refunds received, net of payments 5 938
Stock issued for acquisition 0 3,237
Non-cash transactions    
Change in unpaid construction in process 122 (489)
Accrued PIK interest paid through issuance of PIK Note 1,278 0
Issuance of warrants $ 4,891 $ 9,073