Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Accumulated deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect from adoption of new accounting standard			$ 100	$ (100)
Balance at Dec. 31, 2015	$ 14,203	$ 44	161,330	(147,171)
Balance (shares) at Dec. 31, 2015	43,898,785	43,898,785
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 1,125		1,125
Net loss	(9,499)			(9,499)
Balance at Jun. 30, 2016	$ 5,829	$ 44	$ 162,555	$ (156,770)
Balance (shares) at Jun. 30, 2016	43,898,785	43,898,785