CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows provided by operating activities:
Net (loss) income	$ (485)	$ 39,329
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	7,167	6,178
Amortization of purchased intangible assets	1,076	1,189
Amortization of deferred debt issuance costs	154	130
Stock-based compensation	4,154	3,908
Deferred income taxes	(839)	1,660
Loss on disposal of property, plant and equipment	113	343
Restructuring expenses, net and asset impairments	3,305	6,300
Change in:
Accounts receivable, net	26,890	(12,505)
Inventories	(2,228)	(8,357)
Prepaid expenses and other	(2,855)	(923)
Accounts payable	(10,563)	2,475
Contract liabilities	2,376	1,456
Accrued anti-dumping duties and penalties	0	(8,000)
Accrued expenses and other liabilities	(6,911)	1,913
Net cash provided by operating activities	21,354	35,096
Cash flows used in investing activities:
Acquisition of property, plant and equipment	(9,682)	(22,377)
Proceeds on sale of property, plant and equipment	20	1,258
Net cash used in investing activities	(9,662)	(21,119)
Cash flows used in financing activities:
Repayments on bank lines of credit, net	0	(10,999)
Repayments on capital expenditure facility	(2,344)	(2,344)
Payment of dividends	(3,749)	(896)
Payment of debt issuance costs	(88)	0
Net proceeds from issuance of common stock to employees and directors	266	358
Treasury stock purchases	(1,123)	(1,079)
Net cash used in financing activities	(7,038)	(14,960)
Effects of exchanges rates on cash	(403)	(209)
Net increase (decrease) in cash and cash equivalents	4,251	(1,192)
Cash and cash equivalents, beginning of the period	20,353	13,375
Cash and cash equivalents, end of the period	$ 24,604	$ 12,183