Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OPERATING ACTIVITIES
Net (loss)	$ (10,983,000)	$ (17,388,000)	$ (12,380,000)
Loss from discontinued operations	3,914,000	2,800,000	2,826,000
Net loss from continuing operations	(7,069,000)	(14,588,000)	(9,554,000)
Adjustments to reconcile net loss to net cash used in (provided by) operating activities:
Depreciation	1,312,000	1,780,000	2,067,000
Amortization	215,000	1,118,000	1,536,000
Loss (gain) on disposal of equipment	304,000	60,000	(26,000)
Provision for doubtful accounts, net	0	(111,000)	0
Deferred income taxes	0	1,196,000	4,916,000
Stock compensation expense, net of forfeitures	1,389,000	1,991,000	1,809,000
Building and intangible assets impairment	2,965,000	2,074,000	1,425,000
Excess and obsolete inventory provision	228,000	825,000	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	113,000	3,522,000	7,880,000
Inventories	(134,000)	446,000	(560,000)
Prepaid expenses, other current assets and other noncurrent assets	(1,084,000)	2,893,000	(1,245,000)
Accounts payable	2,500,000	(2,445,000)	1,817,000
Accrued liabilities and other noncurrent liabilities	(2,439,000)	699,000	(913,000)
Net cash (used in) provided by operating activities - continuing operations	(1,700,000)	(540,000)	9,152,000
Net cash used in operating activities - discontinued operations	(1,868,000)	(2,198,000)	(2,224,000)
Net cash (used in) provided by operating activities	(3,568,000)	(2,738,000)	6,928,000
INVESTING ACTIVITIES
Purchases of property, equipment and patents	(492,000)	(940,000)	(802,000)
Proceeds from the sale of equipment	2,000	2,000	26,000
Net cash used in investing activities	(490,000)	(938,000)	(776,000)
FINANCING ACTIVITIES
Payments on short-term borrowings	0	0	(1,623,000)
Change in restricted cash	0	(6,020,000)	0
Treasury shares withheld	(258,000)	(172,000)	(252,000)
Net cash used in financing activities	(258,000)	(6,192,000)	(1,875,000)
Effect of exchange rate fluctuations on cash	856,000	10,000	(1,230,000)
Net (decrease) increase in cash and cash equivalents	(3,460,000)	(9,858,000)	3,047,000
Cash and cash equivalents at beginning of year	11,826,000	21,684,000	18,637,000
Cash and cash equivalents at end of year	8,366,000	11,826,000	21,684,000
Cash paid for:
Interest	0	0	27,000
Income taxes paid	$ 31,000	$ 368,000	$ 0