Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock	Additional Paid-In Capital	Other Comprehensive Income / Loss	Retained Earnings / Accumulated Deficit	Total
Balance at Dec. 31, 2017	$ 29	$ (12,148)	$ 375,611	$ (3)	$ (330,156)	$ 33,333
Balance, Shares at Dec. 31, 2017	2,910,334	(177,484)
Stock-based compensation			21			21
Restricted stock issued			53			53
Restricted stock issued, Shares	6,592
Common stock issued, net of shares withheld for employee taxes			89			89
Common stock issued, net of shares withheld for employee taxes, Shares	249
Net income (loss)					(40)	(40)
Balance at Mar. 31, 2018	$ 29	$ (12,148)	375,774	(3)	(330,196)	33,456
Balance, Shares at Mar. 31, 2018	2,917,175	(177,484)
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
Net income (loss)					56	56
Purchase of treasury stock, at cost		$ (31)				(31)
Purchase of treasury stock, at cost, Shares		(3,999)
Unrealized loss on investments, net of tax				(19)		(19)
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)