CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows provided by (used in) operating activities:
Net income	$ 15,170	$ 3,920
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	1,798	1,570
Amortization of purchased intangible assets	398	805
Amortization of deferred debt issuance costs	47	190
Stock-based compensation	1,171	708
Deferred income taxes	343	(308)
Restructuring expenses	78	144
Transition tax liability	0	(268)
Change in:
Accounts receivable, net	(13,722)	(7,360)
Inventories	110	(10,404)
Prepaid expenses and other	1,178	(1,455)
Accounts payable	5,342	3,767
Contract liabilities	1,363	(700)
Accrued anti-dumping duties and penalties	0	3,128
Accrued expenses and other liabilities	(6,279)	3,285
Net cash provided by (used in) operating activities	6,997	(2,978)
Cash flows used in investing activities:
Acquisition of property, plant and equipment	(6,601)	(5,302)
Proceeds on sale of property, plant and equipment	204	0
Net cash used in investing activities	(6,397)	(5,302)
Cash flows provided by financing activities:
Borrowings on bank lines of credit, net	2,750	7,898
(Repayments) borrowings on capital expenditure facility	(781)	3,278
Payment of dividends	(298)	(295)
Treasury stock purchases	(853)	(343)
Net cash provided by financing activities	818	10,538
Effects of exchanges rates on cash	81	(473)
Net increase in cash and cash equivalents	1,499	1,785
Cash and cash equivalents, beginning of the period	13,375	8,983
Cash and cash equivalents, end of the period	14,874	$ 10,768
Supplemental disclosure of cash flow information:
Non-cash lease liabilities arising from obtaining right-of-use assets (Note 6)	$ 8,821