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]
Intrinsic value of beneficial conversion feature, net of issuance costs	$ 7,017		7,017
Stock-based compensation expense	1,616		1,616
Net loss	(11,798)			(11,798)
Balance at Sep. 30, 2016	$ 11,038	$ 44	$ 170,063	$ (159,069)
Balance (shares) at Sep. 30, 2016	43,898,785	43,898,785