Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities
Net loss	$ (40,428)	$ (30,143)
Adjustments to reconcile net loss to net cash flows used in operating activities:
Restructuring and impairment charges	6,530	352
Depreciation and amortization	2,196	5,884
Non-cash lease expense on right-of-use assets	887	3,065
Recognition of deferred income from state and local incentives	(1,110)	(1,110)
Loss on change in fair market value for warrant liability	18,676	0
Stock-based compensation recognized	2,961	94
Non-cash interest expense	1,981	140
Other non-cash items, net	96	13
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	916	508
VAT receivable	(16,814)	(306)
Inventories	(8,058)	(22,024)
Other assets	(6,263)	(7,188)
Accounts and contractual payables	6,193	6,456
Accrued payroll and employee benefits	(802)	(941)
Income taxes receivable/payable	(360)	(13)
Accrued warranty	(2,366)	(485)
Lease liability	(1,180)	(5,391)
Customer deposits	0	27,889
Other liabilities	(6,749)	2,548
Accrued pension costs and accrued postretirement benefits	(415)	(131)
Net cash flows used in operating activities	(44,109)	(20,783)
Cash flows from investing activities
Purchase of restricted certificates of deposit	0	(3,855)
Maturity of restricted certificates of deposit	182	3,769
Purchase of property, plant and equipment	(1,433)	(7,009)
Proceeds from sale of property, plant and equipment and railcars available for lease	433	170
Net cash flows used in investing activities	(818)	(6,925)
Cash flows from financing activities
Proceeds from issuance of long-term debt	16,000	10,000
Deferred financing cost	(480)	0
Borrowings on revolving line of credit	7,220	0
Repayments on revolving line of credit	(11,068)	0
Employee stock settlement	(7)	(9)
Payment for stock appreciation rights exercised	(55)	0
Net cash flows provided by financing activities	11,610	9,991
Net decrease in cash and cash equivalents	(33,317)	(17,717)
Cash, cash equivalents and restricted cash equivalents at beginning of period	54,047	66,257
Cash, cash equivalents and restricted cash equivalents at end of period	20,730	48,540
Supplemental cash flow information
Interest paid	2,813	217
Income tax refunds received, net of payments	5	0
Non-cash transactions
Change in unpaid construction in process	530	(115)
Accrued PIK interest paid through issuance of PIK Note	$ 553	$ 0