Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common stock	Treasury stock	Additional paid-in capital	Accum other comp inc.	Accum deficit	Total
Beginning Balance at Dec. 31, 2015	$ 28	$ (12,148)	$ 373,565	$ (33)	$ (249,426)	$ 111,986
Beginning Balance, Shares at Dec. 31, 2015	2,800,781	(177,484)
Stock-based compensation			527			527
Restricted stock issued, net of restricted shares withheld for employee taxes	$ 1		558			559
Restricted stock issued, net of restricted shares withheld for employee taxes, Shares	52,990
Common stock issued, net of shares withheld for employee taxes			253			253
Common stock issued, net of shares withheld for employee taxes, Shares	6,596
Foreign currency translation adjustments				(2)		(2)
Unrealized gain on investments, net of tax				5		5
Net loss					(62,879)	(62,879)
Ending Balance at Dec. 31, 2016	$ 29	$ (12,148)	374,903	(30)	(312,305)	50,449
Ending Balance, Shares at Dec. 31, 2016	2,860,367	(177,484)
Exercise of stock options, net of shares withheld for employee taxes			(1)			(1)
Exercise of stock options, net of shares withheld for employee taxes, Shares	168
Stock-based compensation			277			277
Restricted stock issued, net of restricted shares withheld for employee taxes			160			160
Restricted stock issued, net of restricted shares withheld for employee taxes, Shares	16,496
Common stock issued, net of shares withheld for employee taxes			$ 272			$ 272
Common stock issued, net of shares withheld for employee taxes, Shares	33,318
Reverse stock split fractional shares
Reverse stock split fractional shares, Shares	(15)
Foreign currency translation adjustments				$ 10		$ 10
Unrealized gain on investments, net of tax				17		17
Net loss					(17,851)	(17,851)
Ending Balance at Dec. 31, 2017	$ 29	$ (12,148)	$ 375,611	$ (3)	$ (330,156)	$ 33,333
Ending Balance, Shares at Dec. 31, 2017	2,910,334	(177,484)