CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash provided by (used for) operating activities:
Net income	$ 119	$ 2,743
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Depreciation and amortization	7,645	5,929
Provision for doubtful accounts	23	(40)
Provision for inventory write-downs	659	756
Deferred income taxes	(496)	(407)
Tax benefit from exercise of stock options and vested restricted stock	0	616
Excess tax benefit from stock-based compensation	0	(668)
Shares issued for employee benefit plan	346	345
Employee and director stock-based compensation	2,623	2,493
Performance-based common stock warrants	932	866
Changes in operating assets and liabilities:
Restricted cash	4,623	0
Accounts receivable	(3,689)	12,255
Inventories	(1,564)	5,095
Prepaid expenses and other assets	(905)	(1,604)
Accounts payable and accrued expenses	(16,182)	(22,900)
Accrued income taxes	(2,064)	(2,338)
Net cash provided by (used for) operating activities	(7,930)	3,141
Cash used for investing activities:
Acquisition of property, plant, and equipment	(6,460)	(7,480)
Acquisition of intangible assets	(410)	(564)
Net cash used for investing activities	(6,870)	(8,044)
Cash provided by (used for) financing activities:
Borrowings under line of credit	53,000	42,987
Repayments on line of credit	(14,987)	(35,000)
Proceeds from stock options exercised	237	1,935
Treasury stock purchased	(11,389)	(1,724)
Excess tax benefit from stock-based compensation	0	668
Net cash provided by (used for) financing activities	26,861	8,866
Effect of exchange rate changes on cash	(18)	(852)
Net increase (decrease) in cash and cash equivalents	12,043	3,111
Cash and cash equivalents at beginning of year	50,611	52,966
Cash and cash equivalents at end of period	62,654	56,077
Supplemental cash flow information:
Income taxes paid	2,925	2,933
Interest paid	$ 414	$ 302