CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (unaudited) - USD ($) $ in Thousands	Common Stock	Paid In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Treasury Stock	Total
Balance at Dec. 31, 2018	$ 1	$ 313,012	$ (90)	$ (291,874)	$ (258)	$ 20,791
Balance, shares at Dec. 31, 2018	1,436,555
Net loss				(5,949)		(5,949)
Common stock issued, net of issuance costs	$ 1	1,153				1,154
Common stock issued, net of issuance costs (in shares)	221,263
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes		15				15
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes (in shares)	393
Minimum withholding taxes on net share settlements of equity awards		(1)				(1)
Transfer to realized loss upon sale of available for sale securities			$ 90			90
Balance at Jun. 30, 2019	$ 2	314,179		(297,823)	(258)	16,100
Balance, shares at Jun. 30, 2019	1,658,211
Balance at Mar. 31, 2019	$ 1	313,435		(295,048)	(258)	18,130
Balance, shares at Mar. 31, 2019	1,494,153
Net loss				(2,775)		(2,775)
Common stock issued, net of issuance costs	$ 1	738				739
Common stock issued, net of issuance costs (in shares)	164,058
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes		7				7
Minimum withholding taxes on net share settlements of equity awards		(1)				(1)
Balance at Jun. 30, 2019	$ 2	314,179		(297,823)	(258)	16,100
Balance, shares at Jun. 30, 2019	1,658,211
Balance at Dec. 31, 2019	$ 3	319,758		(302,439)	(258)	17,064
Balance, shares at Dec. 31, 2019	3,339,541
Net loss				(5,754)		(5,754)
Common stock and common stock purchase warrants issued, net of issuance costs	$ 4	6,287				6,291
Common stock and common stock purchase warrants issued, net of issuance costs (in shares)	3,324,924
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes		28				28
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes (in shares)	511
Balance at Jun. 30, 2020	$ 7	326,073		(308,193)	(258)	17,629
Balance, shares at Jun. 30, 2020	6,664,976
Balance at Mar. 31, 2020	$ 5	322,227		(305,726)	(258)	16,248
Balance, shares at Mar. 31, 2020	4,762,794
Net loss				(2,467)		(2,467)
Common stock issued, net of issuance costs	$ 2	3,818				3,820
Common stock issued, net of issuance costs (in shares)	1,902,182
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes		28				28
Balance at Jun. 30, 2020	$ 7	$ 326,073		$ (308,193)	$ (258)	$ 17,629
Balance, shares at Jun. 30, 2020	6,664,976