Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Preferred Stock, shares authorized	7,500	7,500
Preferred Stock, shares issued	32	32
Preferred Stock, shares outstanding	32	32
Preferred Stock stated value (in dollars per share)	$ 0.0001	$ 0.0001
Accrued dividends	$ 39	$ 36
Conversion price below this fair value of the common stock (in dollars per share)	$ 1.16
Series B-1 Preferred Stock
Class of Stock [Line Items]
Preferred Stock, shares authorized	100
Preferred Stock, shares issued	0
Preferred Stock, shares outstanding	0
Series A-2 Preferred Stock
Class of Stock [Line Items]
Preferred Stock, shares authorized	7,500
Preferred Stock, shares issued	32
Preferred Stock, shares outstanding	32
Preferred Stock stated value (in dollars per share)	$ 7,500
Conversion of preferred stock (in dollars per share)	$ 2.9835
Convertible preferred stock, shares issued upon conversion	2,514
Preferred stock, cumulative dividend percentage rate (per annum)	5.00%
Series D Preferred Stock
Class of Stock [Line Items]
Preferred Stock, shares authorized	4,000
Preferred Stock, shares issued	0
Preferred Stock, shares outstanding	0
Preferred Stock
Class of Stock [Line Items]
Preferred Stock, shares authorized	5,000,000