CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows provided by operating activities:
Net income	$ 4,155	$ 15,170
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	2,352	1,798
Amortization of purchased intangible assets	354	398
Amortization of deferred debt issuance costs	40	47
Stock-based compensation	1,118	1,171
Deferred income taxes	(160)	343
Loss on disposal of property, plant and equipment	13	0
Restructuring expenses, net and asset impairments	1,116	78
Change in:
Accounts receivable, net	10,277	(13,722)
Inventories	(8,187)	110
Prepaid expenses and other	383	1,178
Accounts payable	(2,752)	5,342
Contract liabilities	955	1,363
Accrued expenses and other liabilities	(4,744)	(6,279)
Net cash provided by operating activities	4,920	6,997
Cash flows used in investing activities:
Acquisition of property, plant and equipment	(5,121)	(6,601)
Proceeds on sale of property, plant and equipment	0	204
Net cash used in investing activities	(5,121)	(6,397)
Cash flows provided by (used in) financing activities:
Borrowings on bank lines of credit, net	0	2,750
Repayments on capital expenditure facility	(781)	(781)
Payment of dividends	(1,866)	(298)
Treasury stock purchases	(1,034)	(853)
Net cash provided by (used in) financing activities	(3,681)	818
Effects of exchanges rates on cash	(20)	81
Net increase (decrease) in cash and cash equivalents	(3,902)	1,499
Cash and cash equivalents, beginning of the period	20,353	13,375
Cash and cash equivalents, end of the period	$ 16,451	$ 14,874