CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows From Operating Activities:
Net income	$ 11,074	$ 13,860	$ 3,953
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,466	7,267	2,913
Deferred income taxes	1,417	1,208	90
Excess tax benefit from stock-based payment arrangements	(1,461)
Provision for doubtful accounts	333	473	158
Provision for excess and obsolete inventory	432	753	105
Provision for warranty	142	234	175
Restricted stock compensation	1,744	1,541	927
Other	216	429	(385)
Changes in operating assets and liabilities, excluding changes due to acquisition:
(Increase) decrease in trade receivables, net	3,655	(2,504)	196
(Increase) decrease in inventories	(2,262)	(2,864)	1,763
(Increase) decrease in prepaid expenses and other	(1,394)	194	(561)
Increase (decrease) in accounts payable	(1,874)	752	558
Increase (decrease) in accrued liabilities and other	585	(1,157)	903
Net cash provided by operating activities	20,073	20,186	10,795
Cash Flows From Investing Activities:
Proceeds from working capital adjustment and (consideration paid for acquisition, net of cash acquired)		1,397	(91,607)
Purchase of property and equipment	(4,730)	(4,046)	(3,087)
Net cash used in investing activities	(4,730)	(2,649)	(94,694)
Cash Flows From Financing Activities:
Borrowings (repayments) on lines-of-credit, net	383	(7,541)	8,475
Principal payments of long-term debt	(6,375)	(5,250)	(1,250)
Proceeds from issuance of long-term debt			80,000
Change in restricted cash obligations		1,800	(1,800)
Payment of debt issuance costs			(2,377)
Dividends paid to stockholders	(923)	(853)	(889)
Shares withheld for payment of employee payroll taxes	(1,559)
Excess tax benefit from stock-based payment arrangements	1,461
Stock transactions under employee benefit stock plans	918	344	434
Net cash (used in) provided by financing activities	(6,095)	(11,500)	82,593
Effect of foreign exchange rate changes on cash	(1,083)	(1,295)	(51)
Net increase (decrease) in cash and cash equivalents	8,165	4,742	(1,357)
Cash and cash equivalents at beginning of period	13,113	8,371	9,728
Cash and cash equivalents at end of period	21,278	13,113	8,371
Net cash paid during the period for:
Interest	5,575	6,014	1,326
Income taxes	$ 2,125	$ 5,921	$ 1,099