CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net income (loss)	$ 702	$ (64,568)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	22,352	22,658
Stock-based compensation expense	7,669	9,541
Restructuring and other charges	6,119	22,465
Gain on sale of property, plant and equipment	(17,770)	(3,886)
Deferred income taxes	1,538	(993)
Changes in operating assets and liabilities:
Trade receivables, net	16,980	11,632
Unbilled receivables	(38,097)	25,961
Inventories, net	2,255	(6,680)
Prepaids and other assets	(10,775)	14,706
Accounts payable and accrued expenses	(10,124)	2,902
Other, net	(16)	0
Net cash provided by (used in) operating activities	(19,167)	33,738
Investing activities
Purchase of property, plant and equipment	(13,712)	(7,928)
Proceeds from sale of property, plant and equipment	18,535	5,967
Purchase of short-term investments	(25,287)	0
Net cash used in investing activities	(20,464)	(1,961)
Financing activities
Repurchase of common shares	(20,807)	(1,132)
Other	(74)	(113)
Net cash used in financing activities	(20,881)	(1,245)
Effect of exchange rate changes on cash activities	(4,660)	(1,315)
Increase (decrease) in cash and cash equivalents	(65,172)	29,217
Cash and cash equivalents at beginning of period	355,451	345,955
Cash and cash equivalents at end of period	$ 290,279	$ 375,172