Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Activities
Net loss	$ (216,000)	$ (2,506,000)
Loss from discontinued operations	25,000	730,000
Net loss from continuing operations	(191,000)	(1,776,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	195,000	405,000
Amortization	53,000	54,000
Loss on disposal of equipment	15,000	10,000
Provision for doubtful accounts, net of recoveries	(62,000)	0
Stock-based compensation, net of forfeitures	(59,000)	(10,000)
Changes in operating assets and liabilities:
Accounts receivable	32,000	3,525,000
Inventories	(68,000)	(26,000)
Prepaid expenses, other current assets and other non-current assets	113,000	108,000
Accounts payable	186,000	(1,848,000)
Accrued liabilities and other non-current liabilities	(2,750,000)	(1,483,000)
Net cash used in operating activities - continuing operations	(2,536,000)	(1,041,000)
Net cash used in operating activities - discontinued operations	(25,000)	(579,000)
Net cash used in operating activities	(2,561,000)	(1,620,000)
Investing Activities
Purchases of equipment and patents	(62,000)	(97,000)
Proceeds from the sale of equipment	2,000	0
Net cash used in investing activities	(60,000)	(97,000)
Financing Activities
Taxes paid on behalf of equity award participants	(11,000)	(23,000)
Net cash used in financing activities	(11,000)	(23,000)
Effect of exchange rate fluctuations on cash	433,000	117,000
Net decrease in cash, cash equivalents and restricted cash	(2,199,000)	(1,623,000)
Cash, cash equivalents, and restricted cash at beginning of period (Note 2)	14,386,000
Cash, cash equivalents and restricted cash at end of period (Note 2)	$ 12,187,000	$ 16,223,000