CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (21,310)	$ (41,594)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	23,449	24,110
Loss on sale of assets and asset impairments	3,522	2,748
Share-based compensation expense	7,057	5,324
Amortization of debt issuance costs		228
Deferred income taxes	3,359	13,221
Changes in assets and liabilities:
Accounts receivable	(42,315)	(19,465)
Contract assets and liabilities	(4,713)	(16,007)
Operating lease right of use assets and operating lease liabilities	(891)	2,971
Inventories	(2,276)	(2,488)
Prepaid expenses	866	8,232
Other current assets	(2,035)	7,151
Other noncurrent assets	6,019	(1,767)
Accounts payable and accrued expenses	(23,787)	18,201
Accrued warranty	(6,442)	(3,390)
Other noncurrent liabilities	336	(730)
Net cash used in operating activities	(59,161)	(3,255)
Cash flows from investing activities:
Purchases of property, plant and equipment	(8,010)	(27,059)
Net cash used in investing activities	(8,010)	(27,059)
Cash flows from financing activities:
Proceeds from (repayments of) revolving and term loans	(1,757)	2,106
Proceeds from working capital loans	11,465	6,383
Repayments of working capital loans	(11,587)
Principal repayments of finance leases	(2,772)	(2,803)
Net proceeds from other debt	(7,689)	13,362
Proceeds from exercise of stock options	2	4,688
Repurchase of common stock including shares withheld in lieu of income taxes	(388)	(34)
Net cash provided by financing activities	(12,726)	23,702
Impact of foreign exchange rates on cash, cash equivalents and restricted cash	(8,649)	(323)
Net change in cash, cash equivalents and restricted cash	(88,546)	(6,935)
Cash, cash equivalents and restricted cash, beginning of year	252,218	130,196
Cash, cash equivalents and restricted cash, end of period	163,672	123,261
Supplemental cash flow information:
Cash paid for interest	1,667	5,255
Cash paid for income taxes, net of refunds	14,677	14,866
Noncash investing and financing activities:
Right of use assets obtained in exchange for new operating lease liabilities	10,670	5,384
Property, plant, and equipment obtained in exchange for new finance lease liabilities		136
Accrued capital expenditures in accounts payable	1,450	3,682
Paid-in-kind preferred stock dividends and accretion	28,682
Reconciliation of Cash, Cash Equivalents and Restricted Cash:
Cash and cash equivalents	242,165	129,857
Restricted cash	10,053	339
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	163,672	123,261
Cash and cash equivalents	155,020	123,107
Restricted cash	8,652	154
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	$ 163,672	$ 123,261