CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows provided by (used in) operating activities:
Net income	$ 32,414	$ 10,292
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	3,955	3,171
Amortization of purchased intangible assets	795	1,596
Amortization of deferred debt issuance costs	83	224
Stock-based compensation	2,666	1,792
Deferred income taxes	424	33
Loss on disposal of property, plant and equipment	(317)	(26)
Restructuring expenses	402	361
Transition tax liability	0	(268)
Change in:
Accounts receivable, net	(16,123)	(14,198)
Inventories	(8,636)	(18,790)
Prepaid expenses and other	3,850	(513)
Accounts payable	12,657	8,813
Contract liabilities	936	(3,509)
Accrued anti-dumping duties and penalties	(8,000)	2,958
Accrued expenses and other liabilities	(2,438)	6,433
Net cash provided by (used in) operating activities	23,302	(1,579)
Cash flows used in investing activities:
Acquisition of property, plant and equipment	(16,283)	(16,201)
Proceeds on sale of property, plant and equipment	1,258	0
Net cash used in investing activities	(15,025)	(16,201)
Cash flows provided by (used in) financing activities:
(Repayments) borrowings on bank lines of credit, net	(3,999)	4,822
(Repayments) borrowings on capital expenditure facility	(1,562)	11,803
Payment of dividends	(598)	(593)
Payment of debt issuance costs	0	(131)
Net proceeds from issuance of common stock to employees and directors	358	230
Treasury stock purchases	(956)	(383)
Net cash provided by (used in) financing activities	(6,757)	15,748
Effects of exchanges rates on cash	(14)	(322)
Net increase (decrease) in cash and cash equivalents	1,506	(2,354)
Cash and cash equivalents, beginning of the period	13,375	8,983
Cash and cash equivalents, end of the period	14,881	$ 6,629
Supplemental disclosure of cash flow information:
Non-cash lease liabilities arising from obtaining right-of-use assets (Note 6)	$ 8,821