Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities
Net loss	$ (2,735)	$ (3,512)
Loss from discontinued operations		1
Net loss from continuing operations	(2,735)	(3,511)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	495	644
Amortization	139	118
(Gain) loss on disposal of equipment	(3)	4
Provision for doubtful accounts, net of recoveries	(1,144)
Adjustment for Operating Lease (Note 2)	(11)
Intangible assets abandonment		127
Stock-based compensation, net of forfeitures	208	357
Changes in operating assets and liabilities:
Accounts receivable	(863)	8,601
Inventories	(71)	654
Prepaid expenses, other current assets and other non-current assets	250	1,804
Accounts payable	820	(6,812)
Accrued liabilities and other non-current liabilities	(376)	(4,306)
Net cash used in operating activities - continuing operations	(3,291)	(2,320)
Net cash used in operating activities - discontinued operations		(21)
Net cash used in operating activities	(3,291)	(2,341)
Investing Activities
Purchases of equipment and patents	(206)	(431)
Net cash used in investing activities - continuing operations	(206)	(431)
Net cash provided by investing activities - discontinued operations		505
Net cash (used in) provided by investing activities	(206)	74
Financing Activities
Proceeds from borrowings	1,556
Taxes paid on behalf of equity award participants	(6)	(2)
Net cash provided by (used in) financing activities	1,550	(2)
Effect of exchange rate fluctuations on cash	256	(458)
Net decrease in cash, cash equivalents and restricted cash	(1,691)	(2,727)
Cash, cash equivalents, and restricted cash at beginning of period (Note 2)	13,501	18,059
Cash, cash equivalents and restricted cash at end of period (Note 2)	$ 11,810	$ 15,332