Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OPERATING ACTIVITIES
Net (loss) income	$ (17,725)	$ 5,101	$ 2,776
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation	1,922	2,175	2,191
Amortization	2,384	839	898
Gain on equipment disposals/impaired assets	0	0	(72)
Unrealized holding loss on marketable securities	0	0	13
Allowance for doubtful accounts	762	707	26
Deferred income taxes	(9,524)	1,252	(458)
Stock compensation expense	2,322	1,798	1,306
Goodwill impairment	23,400	0	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	6,117	(6,970)	4,249
Inventories	(616)	77	(202)
Prepaid expenses, other current assets and other noncurrent assets	(913)	2,118	(1,808)
Accounts payable	(3,600)	(2,968)	2,327
Accrued liabilities and other noncurrent liabilities	906	(1,287)	(2,579)
Net cash provided by operating activities	5,435	2,842	8,667
INVESTING ACTIVITIES
Purchases of property, equipment and patents	(2,808)	(1,754)	(2,534)
Purchases of other intangible assest	(3,010)	0	0
Payment for acquisitions, net of cash acquired	(8,079)	0	0
Net cash used in investing activities	(13,897)	(1,754)	(2,534)
FINANCING ACTIVITIES
Net proceeds (payments) of short-term debt	0	1,614	(1,187)
Proceeds from exercises of stock options	297	811	0
Excess tax benefit from exercises of stock options	7	67	0
Repurchases of common stock	0	0	(7,889)
Treasury shares withheld	(304)	(447)	(39)
Net cash provided by (used in) financing activities	0	2,045	(9,115)
Effect of exchange rate fluctuations on cash	(639)	152	(794)
Net (decrease) increase in cash and cash equivalents	(9,101)	3,285	(3,776)
Cash and cash equivalents at beginning of year	27,738	24,453	28,229
Cash and cash equivalents at end of year	18,637	27,738	24,453
Cash paid for:
Interest	125	56	93
Income taxes paid	$ 0	$ 2,901	$ 2,043