Warrants (Details) $ / shares in Units, $ in Thousands			3 Months Ended		12 Months Ended
		Jan. 29, 2016 $ / shares shares	Mar. 31, 2016 USD ($) Warrant $ / shares shares	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($) Warrant $ / shares shares
Fair Value Assumptions [Abstract]
Number of shares underlying the warrants | shares		99,057			650,442
Stock price (in dollars per share) | $ / shares		$ 1.05			$ 1.11
Volatility		50.00%			50.00%
Risk-free interest rate		1.80%			1.80%
Expected dividend yield		0.00%			0.00%
Expected warrant life		5 years			5 years
Warrant [Member]
Fair Value Assumptions [Abstract]
Number of shares underlying the warrants | shares			14,099,267		14,099,267
Stock price (in dollars per share) | $ / shares			$ 0.95		$ 1.11
Volatility			50.00%
Expected dividend yield			0.00%		0.00%
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants, beginning of period			14,099,267
Additions			0
Reductions			0
Balance as end of period			14,099,267		14,099,267
Warrant [Member] | Minimum [Member]
Fair Value Assumptions [Abstract]
Volatility					35.90%
Risk-free interest rate			0.26%		0.02%
Expected warrant life			3 months 25 days		25 days
Warrant [Member] | Maximum [Member]
Fair Value Assumptions [Abstract]
Volatility					50.00%
Risk-free interest rate			1.07%		1.63%
Expected warrant life			4 years 2 months 23 days		4 years 5 months 23 days
Warrant [Member] | 10/31/2013 [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants, beginning of period			685,715
Additions			0
Reductions			0
Balance as end of period			685,715		685,715
Warrant [Member] | 2/5/2014 [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants, beginning of period			1,329,731
Additions			0
Reductions			0
Balance as end of period			1,329,731		1,329,731
Warrant [Member] | 7/24/2014 Series A [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants, beginning of period			4,288,500
Additions			0
Reductions			0
Balance as end of period			4,288,500		4,288,500
Warrant [Member] | 7/24/2014 Series B [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants, beginning of period			4,795,321
Additions			0
Reductions			0
Balance as end of period			4,795,321		4,795,321
Warrant [Member] | 6/22/2015 [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants, beginning of period			3,000,000
Additions			0
Reductions			0
Balance as end of period			3,000,000		3,000,000
Warrant [Member] | Level 3 [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Balance as beginning of period | $			$ 7,042	$ 499	$ 499
Increase (decrease) in fair value | $			(1,985)	1,334
Balance as end of period | $			5,057	1,833	7,042
Warrant [Member] | Level 3 [Member] | 10/31/2013 [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Balance as beginning of period | $			379	233	233
Increase (decrease) in fair value | $			(99)	377
Balance as end of period | $			280	610	379
Warrant [Member] | Level 3 [Member] | 2/5/2014 [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Balance as beginning of period | $			715	266	266
Increase (decrease) in fair value | $			(187)	957
Balance as end of period | $			528	$ 1,223	715
Warrant [Member] | Level 3 [Member] | 7/24/2014 Series A [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Balance as beginning of period | $	[1]		2,415
Increase (decrease) in fair value | $	[1]		(621)
Balance as end of period | $	[1]		1,794		2,415
Warrant [Member] | Level 3 [Member] | 7/24/2014 Series B [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Balance as beginning of period | $	[1]		1,726
Increase (decrease) in fair value | $	[1]		(638)
Balance as end of period | $	[1]		1,088		1,726
Warrant [Member] | Level 3 [Member] | 6/22/2015 [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Balance as beginning of period | $			1,807
Increase (decrease) in fair value | $			(440)
Balance as end of period | $			$ 1,367		$ 1,807

[1] These warrants were modified on September 30, 2015 and as a result of the modification these warrants met the definition of a derivative and were reclassified to a warrant liability.