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, 2018	$ 29	$ (12,213)	$ 375,979	$ (2)	$ (329,193)	$ 34,600
Balance, Shares at Dec. 31, 2018	2,919,542	(185,941)
Stock-based compensation			11			11
Common stock issued, net of shares withheld for employee taxes
Common stock issued, net of shares withheld for employee taxes, Shares	1,946
Purchase of treasury stock, at cost		$ (31)				(31)
Purchase of treasury stock, at cost, Shares		(3,999)
Unrealized gain (loss) on investments, net of tax				(19)		(19)
Net income (loss)					56	56
Balance at Mar. 31, 2019	$ 29	$ (12,244)	375,990	(21)	(329,137)	34,617
Balance, Shares at Mar. 31, 2019	2,921,488	(189,940)
Stock-based compensation			9			9
Common stock issued, net of shares withheld for employee taxes			36			36
Common stock issued, net of shares withheld for employee taxes, Shares	4,469
Purchase of treasury stock, at cost		$ (470)				(470)
Purchase of treasury stock, at cost, Shares		(58,850)
Unrealized gain (loss) on investments, net of tax				22		22
Net income (loss)					(836)	(836)
Balance at Jun. 30, 2019	$ 29	$ (12,714)	376,035	1	(329,973)	33,378
Balance, Shares at Jun. 30, 2019	2,925,957	(248,790)
Balance at Dec. 31, 2019	$ 29	$ (12,749)	376,306	(1)	(330,340)	33,245
Balance, 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, Shares		(146,674)
Unrealized gain (loss) on investments, net of tax				11		11
Net income (loss)					(2,209)	(2,209)
Balance at Mar. 31, 2020	$ 29	$ (13,954)	376,317	10	(332,549)	29,853
Balance, Shares at Mar. 31, 2020	2,955,253	(399,756)
Stock-based compensation			2			2
Purchase of treasury stock, at cost		$ (663)				(663)
Purchase of treasury stock, at cost, Shares		(83,104)
Unrealized gain (loss) on investments, net of tax				(11)		(11)
Net income (loss)					1,711	1,717
Balance at Jun. 30, 2020	$ 29	$ (14,617)	$ 376,319	$ (1)	$ (330,838)	$ 30,892
Balance, Shares at Jun. 30, 2020	2,955,253	(482,860)