Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2018		$ 45	$ 254,736	$ (236,312)	$ (500)	$ 17,969
Balance, shares at Dec. 31, 2018	5,659	45,323,339
Stock based compensation			193			193
Net loss				(1,439)		(1,439)
Balance at Mar. 31, 2019		$ 45	254,929	(237,751)	(500)	16,723
Balance, shares at Mar. 31, 2019	5,659	45,323,339
Balance at Dec. 31, 2018		$ 45	254,736	(236,312)	(500)	17,969
Balance, shares at Dec. 31, 2018	5,659	45,323,339
Net loss						(4,092)
Balance at Sep. 30, 2019		$ 49	258,497	(240,403)	(500)	17,643
Balance, shares at Sep. 30, 2019	5,659	49,335,839
Balance at Mar. 31, 2019		$ 45	254,929	(237,751)	(500)	16,723
Balance, shares at Mar. 31, 2019	5,659	45,323,339
Stock based compensation			97			97
Public offering of common shares, net of offering costs		$ 4	3,299			3,303
Public offering of common shares, net of offering costs, shares		4,000,000
Exercise of common stock warrants			8			8
Exercise of common stock warrants, shares		12,500
Net loss				(2,337)		(2,337)
Balance at Jun. 30, 2019		$ 49	258,333	(240,088)	(500)	17,794
Balance, shares at Jun. 30, 2019	5,659	49,335,839
Stock based compensation			164			164
Net loss				(315)		(315)
Balance at Sep. 30, 2019		$ 49	258,497	(240,403)	(500)	17,643
Balance, shares at Sep. 30, 2019	5,659	49,335,839
Balance at Dec. 31, 2019		$ 50	258,767	(240,610)	(500)	17,707
Balance, shares at Dec. 31, 2019	5,659	50,250,378
Stock based compensation			43			43
Public offering of common shares, net of offering costs		$ 4	1,548			1,552
Public offering of common shares, net of offering costs, shares		3,730,540
Net loss				(1,369)		(1,369)
Balance at Mar. 31, 2020		$ 54	260,358	(241,979)	(500)	17,933
Balance, shares at Mar. 31, 2020	5,659	53,980,918
Balance at Dec. 31, 2019		$ 50	258,767	(240,610)	(500)	17,707
Balance, shares at Dec. 31, 2019	5,659	50,250,378
Net loss						(7,731)
Balance at Sep. 30, 2020		$ 68	268,720	(248,341)	(500)	19,947
Balance, shares at Sep. 30, 2020	5,659	67,661,668
Balance at Mar. 31, 2020		$ 54	260,358	(241,979)	(500)	17,933
Balance, shares at Mar. 31, 2020	5,659	53,980,918
Stock based compensation			44			44
Public offering of common shares, net of offering costs		$ 3	1,756			1,759
Public offering of common shares, net of offering costs, shares		3,408,913
Exercise of common stock warrants		$ 4	36			40
Exercise of common stock warrants, shares		4,017,500
Net loss				(2,831)		(2,831)
Balance at Jun. 30, 2020		$ 61	262,194	(244,810)	(500)	16,945
Balance, shares at Jun. 30, 2020	5,659	61,407,331
Stock based compensation			60			60
Public offering of common shares, net of offering costs		$ 7	6,466			6,473
Public offering of common shares, net of offering costs, shares		6,135,991
Exercise of common stock warrants		$ 0	0
Exercise of common stock warrants, shares		118,346
Net loss				(3,531)		(3,531)
Balance at Sep. 30, 2020		$ 68	$ 268,720	$ (248,341)	$ (500)	$ 19,947
Balance, shares at Sep. 30, 2020	5,659	67,661,668