Condensed Consolidated Statements of Changes in 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						(4,300)
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