Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating Activities
Net income (loss)	$ (3,512,000)	$ (924,000)
Loss from discontinued operations	1,000	109,000
Net income (loss) from continuing operations	(3,511,000)	(815,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	644,000	502,000
Amortization	118,000	158,000
Loss (gain) on disposal of equipment	4,000	(11,000)
Provision for doubtful accounts, net of recoveries	0	(62,000)
Intangible assets abandonment	127,000	317,000
Stock-based compensation, net of forfeitures	357,000	135,000
Changes in operating assets and liabilities:
Accounts receivable	8,601,000	(7,192,000)
Inventories	654,000	280,000
Prepaid expenses, other current assets and other non-current assets	1,804,000	1,840,000
Accounts payable	(6,812,000)	3,896,000
Accrued liabilities and other non-current liabilities	(4,306,000)	(1,378,000)
Net cash used in operating activities - continuing operations	(2,320,000)	(2,330,000)
Net cash used in operating activities - discontinued operations	(21,000)	(334,000)
Net cash used in operating activities	(2,341,000)	(2,664,000)
Investing Activities
Purchases of equipment and patents	(431,000)	(392,000)
Proceeds from the sale of equipment	0	1,000
Net cash used in investing activities - continuing operations	(431,000)	(391,000)
Net cash provided by investing activities - discontinued operations (Note 4)	505,000	0
Net cash used in investing activities - continuing operations	74,000	(391,000)
Financing Activities
Taxes paid on behalf of equity award participants	(2,000)	(12,000)
Net cash used in financing activities	(2,000)	(12,000)
Effect of exchange rate fluctuations on cash	(458,000)	(601,000)
Net decrease in cash, cash equivalents and restricted cash	(2,727,000)	(3,668,000)
Cash, cash equivalents, and restricted cash at beginning of period (Note 2)	18,059,000	14,386,000
Cash, cash equivalents and restricted cash at end of period (Note 2)	$ 15,332,000	$ 10,718,000