Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2013
Balance at Dec. 31, 2013			$ 23,149	$ (15,098)	$ 8,108
Net loss				(6,763)	(6,763)
Stock-based compensation expense			592		592
Stock Issued During Period, Shares, New Issues
Stock Issued During Period, Value, New Issues			1,990		2,000
Balance (in shares) at Dec. 31, 2014
Balance at Dec. 31, 2014			25,731	(21,861)	3,937
Net loss				(13,309)	(13,309)
Stock-based compensation expense			500		500
Stock Issued During Period, Shares, New Issues	750	9,643
Stock Issued During Period, Value, New Issues	$ 456	$ 96	5,669		6,221
Balance (in shares) at Dec. 31, 2015	750	16,597
Balance at Dec. 31, 2015	$ 664	$ 165	32,535	$ (35,170)	(1,806)
Issuance of common stock upon exercise of equity incentive awards (in shares)
Issuance of common stock upon exercise of equity incentive awards			33		33
Issuance of common stock upon conversion of restricted stock and restricted stock units (in shares)
Issuance of common stock upon conversion of restricted stock and restricted stock units			(2)
Reclassification of warrant liability due to waiver of exercise price adjustment provisions			812		$ 812
Accretion of convertible preferred stock from beneficial conversion			$ (208)