Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Series C Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2013	$ 5,483	$ 0	$ 1	$ 27,761	$ (22,279)
Balance (in shares) at Dec. 31, 2013		0	13,276,037
Reclassification of warrants from liability to equity	10,202	$ 0	$ 0	10,202	0
Issuance of shares of common stock as part of March 2014 Warrant amendment	825	$ 0	$ 0	825	0
Issuance of shares of common stock as part of March 2014 Warrant amendment (in shares)		0	224,127
Exercise of options and warrants	251	$ 0	$ 0	251	0
Exercise of options and warrants (in shares)		0	97,292
Issuance of shares and warrants, net of issuance costs of $1,136	11,029	$ 0	$ 1	11,028	0
Issuance of shares and warrants, net of issuance costs of $1,136 (in shares)		0	4,505,697
Settlement of derivative liability	750	$ 0	$ 0	750	0
Settlement of derivative liability (in shares)		0	300,000
Conversion of convertible promissory note	1,000	$ 0	$ 0	1,000	0
Conversion of convertible promissory note (in shares)		0	400,000
Conversion of Series C Preferred Stock reclassified from mezzanine to equity	1,209	$ 0	$ 0	1,209
Reclassification of Series C Preferred Stock from mezzanine	1,887	$ 1,887	$ 0	0	0
Reclassification of Series C Preferred Stock from mezzanine (in shares)		6,512	0
Conversion of Series C Preferred Stock and associated dividends	0	$ (1,066)	$ 0	1,066	0
Conversion of Series C Preferred Stock and associated dividends (in shares)		(3,680)	2,975,319
Accrued dividend for Series C Preferred Stock	(256)	$ 0	$ 0	(256)	0
Accrued dividend for Series C Preferred Stock (in shares)		0	0
Acceleration of stock awards in connection with November 2014 convertible promissory note	2,217	$ 0	$ 0	2,217	0
Acceleration of stock awards in connection with November 2014 convertible promissory note (in shares)		0	866,666
Stock-based compensation, stock awards	4,000	$ 0	$ 0	4,000	0
Stock-based compensation, stock awards (in shares)		0	1,330,220
Stock-based compensation, option awards	2,497	$ 0	$ 0	2,497	0
Stock-based compensation, option awards (in shares)		0	0
Loss for the period	(23,550)	$ 0	$ 0	0	(23,550)
Balance at Dec. 31, 2014	17,544	$ 821	$ 2	62,550	(45,829)
Balance (in shares) at Dec. 31, 2014		2,832	23,975,358
Exercise of options and warrants	143	$ 0	$ 0	143	0
Exercise of options and warrants (in shares)		0	388,052
Conversion of convertible promissory note	0
Conversion of Series C Preferred Stock and associated dividends	250	$ (821)	$ 0	1,071	0
Conversion of Series C Preferred Stock and associated dividends (in shares)		(2,832)	2,627,563
Accrued dividend for Series C Preferred Stock		$ (1,600)
Conversion of Series D Preferred Stock to common stock and accretion of deemed dividend	2,439	$ 0	$ 1	2,438	0
Conversion of Series D Preferred Stock to common stock and accretion of deemed dividend (in shares)		0	4,511,730
Stock-based compensation, stock awards	2,833	$ 0	$ 0	2,833	0
Stock-based compensation, stock awards (in shares)		0	588,169
Shares issued to settle liabilities	537	$ 0	$ 0	537	0
Shares issued to settle liabilities (in shares)		0	290,594
Shares issued for financing costs	100	$ 0	$ 0	100	0
Shares issued for financing costs (in shares)		0	53,476
Warrants issued in connection with debt financing	416	$ 0	$ 0	416	0
Warrants issued in connection with Series D financing	758	0	0	758	0
Loss for the period	(17,157)	0	0	0	(17,157)
Balance at Dec. 31, 2015	$ 7,863	$ 0	$ 3	$ 70,846	$ (62,986)
Balance (in shares) at Dec. 31, 2015		0	32,434,942