Condensed Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Common stock	Treasury stock	Additional paid-in capital	Accum other comp loss	Accum deficit	Total
Balance at Dec. 31, 2019	$ 29	$ (12,749)	$ 376,306	$ (1)	$ (330,340)	$ 33,245
Balance (in Shares) at Dec. 31, 2019	2,955,253	(253,082)
Stock-based compensation			11			11
Purchase of treasury stock, at cost		$ (1,205)				(1,205)
Purchase of treasury stock, at cost (in Shares)		(146,674)
Unrealized gain on investments, net of tax				11		11
Net loss					(2,209)	(2,209)
Balance at Mar. 31, 2020	$ 29	$ (13,954)	376,317	10	(332,549)	29,853
Balance (in Shares) at Mar. 31, 2020	2,955,253	(399,756)
Balance at Dec. 31, 2020	$ 29	$ (15,147)	376,456		(331,403)	29,935
Balance (in Shares) at Dec. 31, 2020	2,971,283	(549,028)
Stock-based compensation			341			341
Common stock issued, net of shares withheld for employee taxes			(162)			(162)
Common stock issued, net of shares withheld for employee taxes (in Shares)	16,600
Net loss					(807)	(807)
Balance at Mar. 31, 2021	$ 29	$ (15,147)	$ 376,635		$ (332,210)	$ 29,307
Balance (in Shares) at Mar. 31, 2021	2,987,883	(549,028)