Condensed Consolidated Statements Of Shareholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Total
Beginning Balance, shares at Dec. 31, 2018	41,464,373
Beginning Balance at Dec. 31, 2018	$ 63,211	$ 296	$ (64,210)	$ (703)
Stock-based compensation, shares	163,179
Stock-based compensation	$ 103			103
Common stock issuance on conversion of notes payable, shares	4,012,728
Common stock issuance on conversion of notes payable	$ 1,285			1,285
Common stock and warrants issued, net of offering costs of $183, shares	15,000,000
Common stock and warrants issued, net of offering costs of $183	$ 8,817			8,817
Exercise of stock options, shares	67,945
Exercise of stock options	$ 27			27
Net loss			(1,848)	(1,848)
Other comprehensive income (loss)		33		33
Ending Balance, shares at Sep. 30, 2019	60,708,225
Ending Balance at Sep. 30, 2019	$ 73,443	329	(66,058)	7,714
Beginning Balance, shares at Jun. 30, 2019	43,955,282
Beginning Balance at Jun. 30, 2019	$ 64,067	337	(65,582)	(1,178)
Stock-based compensation, shares	51,691
Stock-based compensation	$ 14			14
Common stock issuance on conversion of notes payable, shares	1,698,752
Common stock issuance on conversion of notes payable	$ 544			544
Common stock and warrants issued, net of offering costs of $183, shares	15,000,000
Common stock and warrants issued, net of offering costs of $183	$ 8,817			8,817
Exercise of stock options, shares	2,500
Exercise of stock options	$ 1			1
Net loss			(476)	(476)
Other comprehensive income (loss)		(8)		(8)
Ending Balance, shares at Sep. 30, 2019	60,708,225
Ending Balance at Sep. 30, 2019	$ 73,443	329	(66,058)	$ 7,714
Beginning Balance, shares at Dec. 31, 2019	61,566,076			61,566,076
Beginning Balance at Dec. 31, 2019	$ 73,773	342	(66,988)	$ 7,127
Stock-based compensation, shares	409,672
Stock-based compensation	$ 124			124
Beneficial conversion feature on paid in-kind interest	$ 9			9
Common stock issuance on conversion of notes payable, shares
Net loss			(2,079)	(2,079)
Other comprehensive income (loss)		(14)		$ (14)
Ending Balance, shares at Sep. 30, 2020	61,975,748			61,975,748
Ending Balance at Sep. 30, 2020	$ 73,906	328	(69,067)	$ 5,167
Beginning Balance, shares at Jun. 30, 2020	61,667,668
Beginning Balance at Jun. 30, 2020	$ 73,846	303	(68,617)	5,532
Stock-based compensation, shares	308,080
Stock-based compensation	$ 57			57
Beneficial conversion feature on paid in-kind interest	$ 3			3
Common stock issuance on conversion of notes payable, shares
Net loss			(450)	(450)
Other comprehensive income (loss)		25		$ 25
Ending Balance, shares at Sep. 30, 2020	61,975,748			61,975,748
Ending Balance at Sep. 30, 2020	$ 73,906	$ 328	$ (69,067)	$ 5,167