Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES
Net loss	$ (4,278,000)	$ (7,852,000)
Loss from discontinued operations		1,000
Net loss from continuing operations	(4,278,000)	(7,851,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	663,000	810,000
Amortization	185,000	186,000
Gain on disposal of equipment	(5,000)	(3,000)
Provision for doubtful accounts, net of recoveries	(1,026,000)	421,000
Deferred income taxes	(38,000)
Stock-based compensation, net of forfeitures	290,000	574,000
Intangible assets abandonment	197,000	127,000
Excess and obsolete inventory provision		(131,000)
Foreign exchange gain		370,000
Changes in operating assets and liabilities:
Accounts receivable	1,095,000	11,415,000
Inventories	171,000	818,000
Prepaid expenses, other current assets and other non-current assets	(161,000)	2,239,000
Accounts payable	198,000	(7,331,000)
Accrued liabilities and other non-current liabilities	2,000	(5,010,000)
Net cash used in operating activities - continuing operations	(2,707,000)	(3,366,000)
Net cash used in operating activities - discontinued operations		(21,000)
Net cash used in operating activities	(2,707,000)	(3,387,000)
INVESTING ACTIVITIES
Purchases of equipment and patents	(247,000)	(550,000)
Net cash used in investing activities - continued operations	(247,000)	(550,000)
Net cash provided by investing activities - discontinued operations		505,000
Net cash used in investing activities	(247,000)	(45,000)
FINANCING ACTIVITIES
Proceeds from Borrowings	1,556,000
Proceeds from Option Exercises	296,000	0
Taxes paid on behalf of equity award participants	(570,000)	(128,000)
Net cash provided by (used in) financing activities	1,282,000	(128,000)
Effect of exchange rate fluctuations on cash	777,000	(998,000)
Net decrease in cash, cash equivalents and restricted cash	(895,000)	(4,558,000)
Cash, cash equivalents and restricted cash at beginning of period	13,501,000	18,059,000
Cash, cash equivalents and restricted cash at end of period	12,606,000	13,501,000
Supplemental Cash Flow Information:
Income taxes	$ 95,000	$ 18,000