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				(3,174)		(3,174)
Common stock issued, net of issuance costs		416				416
Common stock issued, net of issuance costs (in shares)	57,205
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes		8				8
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 Mar. 31, 2019	$ 1	313,435		(295,048)	(258)	18,130
Balance, shares at Mar. 31, 2019	1,494,153
Balance at Dec. 31, 2019	$ 3	319,758		(302,439)	(258)	17,064
Balance, shares at Dec. 31, 2019	3,339,541
Net loss				(3,287)		(3,287)
Common stock and common stock purchase warrants issued, net of issuance costs	$ 2	2,469				2,471
Common stock and common stock purchase warrants issued, net of issuance costs (in shares)	1,422,742
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes (in shares)	511
Balance at Mar. 31, 2020	$ 5	$ 322,227		$ (305,726)	$ (258)	$ 16,248
Balance, shares at Mar. 31, 2020	4,762,794