Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OPERATING ACTIVITIES
Net (loss) income	$ (12,380,000)	$ (17,725,000)	$ 5,101,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation	2,067,000	1,922,000	2,175,000
Amortization	2,138,000	2,384,000	839,000
Gain on disposal of equipment	(26,000)	0	0
Allowance for doubtful accounts	0	762,000	707,000
Deferred income taxes	4,916,000	(9,524,000)	1,252,000
Stock compensation expense	1,809,000	2,322,000	1,798,000
Goodwill and intangible assets impairment	1,425,000	23,400,000	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	7,880,000	6,117,000	(6,970,000)
Inventories	(560,000)	(616,000)	77,000
Prepaid expenses, other current assets and other noncurrent assets	(1,245,000)	(913,000)	2,118,000
Accounts payable	1,817,000	(3,600,000)	(2,968,000)
Accrued liabilities and other noncurrent liabilities	(913,000)	906,000	(1,287,000)
Net cash provided by operating activities	6,928,000	5,435,000	2,842,000
INVESTING ACTIVITIES
Purchases of property, equipment and patents	(802,000)	(2,808,000)	(1,754,000)
Proceeds from the sale of equipment	26,000	0	0
Purchases of other intangible assets	0	(3,010,000)	0
Payment for acquisitions, net of cash acquired	0	(8,079,000)	0
Net cash used in investing activities	(776,000)	(13,897,000)	(1,754,000)
FINANCING ACTIVITIES
Net proceeds (payments) of short-term debt	(1,623,000)	0	1,614,000
Proceeds from exercises of stock options	0	297,000	811,000
Excess tax benefit from exercises of stock options	0	7,000	67,000
Treasury shares withheld	(252,000)	(304,000)	(447,000)
Net cash provided by (used in) financing activities	(1,875,000)	0	2,045,000
Effect of exchange rate fluctuations on cash	(1,230,000)	(639,000)	152,000
Net (decrease) increase in cash and cash equivalents	3,047,000	(9,101,000)	3,285,000
Cash and cash equivalents at beginning of year	18,637,000	27,738,000	24,453,000
Cash and cash equivalents at end of year	21,684,000	18,637,000	27,738,000
Cash paid for:
Interest	27,000	125,000	56,000
Income taxes paid	$ 0	$ 0	$ 2,901,000