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Consolidated Statements of Cash Flows - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities    
Net loss $ (86,098) $ (75,238)
Adjustments to reconcile net loss to net cash flows used in operating activities:    
Restructuring and impairment charges 18,325 22,371
Depreciation and amortization 9,202 12,438
Non-cash lease expense on right-of-use assets 7,063 10,485
Recognition of deferred income from state and local incentives (2,219) (2,219)
Loss on change in fair market value of warrant liability 3,657  
Loss on sale of railcars available for lease   7,197
Impairment on leased railcars 18,951  
Gain on termination of postretirement benefit plan   (6,637)
Deferred income taxes 136 176
Stock-based compensation recognized 1,034 1,225
Non-cash interest expense 1,023 225
Other non-cash items, net 4,192 (1,200)
Changes in operating assets and liabilities, net of acquisitions:    
Accounts receivable (6,892) 11,227
Inventories (17,942) 40,649
Other assets 1,763 (2,127)
Accounts and contractual payables 3,975 (23,961)
Accrued payroll and employee benefits (2,027) (1,368)
Income taxes receivable/payable 991 155
Accrued warranty (3,172) (921)
Lease liability (11,553) (17,602)
Other liabilities 1,040 6,201
Accrued pension costs and accrued postretirement benefits (354) (55)
Net cash flows used in operating activities (58,905) (18,979)
Cash flows from investing activities    
Purchase of restricted certificates of deposit (4,219) (4,981)
Maturity of restricted certificates of deposit 7,806 6,164
Purchase of securities held to maturity   (1,986)
Proceeds from maturity of securities   20,025
Purchase of property, plant and equipment (9,849) (5,573)
Proceeds from sale of property, plant and equipment and railcars available for lease 170 17,305
Cash paid to acquire JV non-controlling interest (172)  
Net cash flows (used in) provided by investing activities (6,092) 30,954
Cash flows from financing activities    
Proceeds from issuance of long-term debt 50,000 10,200
Borrowings on revolving line of credit 6,874  
Repayments on revolving line of credit (95)  
Cash paid to acquire JV non-controlling interest (172)  
Employee stock settlement (9) (59)
Deferred financing costs (3,811) (929)
Net cash flows provided by financing activities 52,787 9,212
Net (decrease) increase in cash and cash equivalents (12,210) 21,187
Cash, cash equivalents and restricted cash equivalents at beginning of year 66,257 45,070
Cash, cash equivalents and restricted cash equivalents at end of year 54,047 66,257
Supplemental cash flow information    
Interest paid 421 196
Income tax refunds received, net of payments $ 938 $ 978
Stock issued for acquisition 3,237