Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities
Net income	$ 5,714	$ 6,241
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization expense	4,113	4,061
Stock-based compensation expense	745	604
Amortization of debt issuance costs and debt discount	482	158
Loss on sale of a discontinued operation		1,039
Excess tax benefits from stock-based compensation	(239)
Deferred income tax	(58)	10,067
Other, net	(13)	(20)
Changes in operating assets and liabilities:
Accounts receivable	7,711	1,382
Inventories	1,957	(5,610)
Prepaid expenses and other assets	(532)	959
Income taxes	4,433	(10,454)
Accounts payable	(3,758)	4,164
Accrued expenses	(3,980)	(876)
Deferred revenue and customer deposits	199	941
Other liabilities	(18)	23
Cash provided by operating activities	16,756	12,679
Investing activities
Acquisitions of plant, equipment and leasehold improvements	(3,780)	(5,658)
Proceeds from sale of a discontinued operation		5,000
Cash used in investing activities	(3,780)	(658)
Financing activities
Payment on Senior Term Loan		(6,629)
Excess tax benefits from stock-based compensation	239
Redemption of preferred and common stock		(417)
Cash provided by (used in) financing activities	239	(7,046)
Effect of exchange rates on cash	32	(138)
Net increase in cash and cash equivalents:	13,247	4,837
Cash and cash equivalents, beginning of period	13,606	12,941
Cash and cash equivalents, end of period	26,853	17,778
Supplemental disclosures of cash flow information
Interest	4,621	1,699
Income taxes	$ (1,567)	$ 2,015