Condensed Consolidated Statements Of Shareholders' Deficit - USD ($) $ in Thousands	Common Stock [Member] Long-term Debt [Member]	Common Stock [Member] Short-term Debt [Member]	Common Stock [Member]	Additional Paid-in Capital [Member] Long-term Debt [Member]	Additional Paid-in Capital [Member] Short-term Debt [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member] Long-term Debt [Member]	Accumulated Deficit [Member] Short-term Debt [Member]	Accumulated Deficit [Member]	Long-term Debt [Member]	Short-term Debt [Member]	Total
Cumulative effect of change in accounting principle									$ (38)			$ (38)
Balance, value at Dec. 31, 2018			287			366,695			(392,292)			(25,310)
Issuance of common stock upon exercise of warrants			15									15
Issuance of common stock upon conversion	$ 4			$ 76						$ 80
Share-based compensation, net of shares withheld for taxes						67						67
Comprehensive loss for the period									(2,094)			(2,094)
Balance, value at Mar. 31, 2019			306			366,838			(394,424)			(27,280)
Balance, value at Dec. 31, 2018			287			366,695			(392,292)			(25,310)
Comprehensive loss for the period												(5,775)
Balance, value at Sep. 30, 2019			335			368,050			(398,105)			(29,720)
Balance, value at Mar. 31, 2019			306			366,838			(394,424)			(27,280)
Issuance of common stock and warrants in private offerings, net of issuance costs and initial fair value of contingent payment rights			6			54						60
Issuance of common stock upon conversion	5			43						48
Share-based compensation, net of shares withheld for taxes						48						48
Comprehensive loss for the period									(1,562)			(1,562)
Balance, value at Jun. 30, 2019			317			366,983			(395,986)			(28,686)
Issuance of common stock and warrants in private offerings, net of issuance costs and initial fair value of contingent payment rights						180						180
Issuance of common stock upon exercise of warrants			14									14
Issuance of convertible debt with beneficial conversion feature						550						550
Issuance of common stock upon conversion	4			51						55
Share-based compensation, net of shares withheld for taxes						286						286
Comprehensive loss for the period									(2,119)			(2,119)
Balance, value at Sep. 30, 2019			335			368,050			(398,105)			(29,720)
Balance, value at Dec. 31, 2019			341			368,345			(401,783)			(33,097)
Issuance of common stock and warrants in private offerings, net of issuance costs and initial fair value of contingent payment rights			39			2,811						2,850
Issuance of common stock upon exercise of warrants			14			487						501
Issuance of common stock and warrants for services			5			219						224
Issuance of convertible debt with beneficial conversion feature						173						173
Issuance of common stock upon conversion	7	$ 22		187	$ 318					194	$ 340
Share-based compensation, net of shares withheld for taxes			3			458						461
Comprehensive loss for the period									(7,921)			(7,921)
Balance, value at Mar. 31, 2020			431			372,998			(409,704)			(36,275)
Balance, value at Dec. 31, 2019			341			368,345			(401,783)			(33,097)
Comprehensive loss for the period												(13,174)
Balance, value at Sep. 30, 2020			520			375,370			(414,957)			(39,067)
Balance, value at Mar. 31, 2020			431			372,998			(409,704)			(36,275)
Issuance of common stock and warrants in private offerings, net of issuance costs and initial fair value of contingent payment rights			43			725						768
Issuance of common stock upon exercise of warrants			11			363						374
Issuance of common stock and warrants for services			1			13						14
Issuance of common stock upon conversion	1			66						67
Share-based compensation, net of shares withheld for taxes			4			299						303
Comprehensive loss for the period									(3,585)			(3,585)
Balance, value at Jun. 30, 2020			491			374,464			(413,289)			(38,334)
Issuance of common stock and warrants in private offerings, net of issuance costs and initial fair value of contingent payment rights			15			215						230
Issuance of common stock upon exercise of warrants			10			340						350
Issuance of common stock and warrants for services			1			25						26
Issuance of common stock upon conversion	$ 2			$ 87						$ 89
Share-based compensation, net of shares withheld for taxes			1			239						240
Comprehensive loss for the period									(1,668)			(1,668)
Balance, value at Sep. 30, 2020			$ 520			$ 375,370			$ (414,957)			$ (39,067)