Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)	7,500	7,500
Preferred Stock, shares issued (in shares)	32	32
Preferred Stock, shares outstanding (in shares)	32	32
Preferred Stock stated value (in dollars per share)	$ 0.0001	$ 0.0001
Accrued dividends	$ 41	$ 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 (in shares)	100
Preferred Stock, shares issued (in shares)	0
Preferred Stock, shares outstanding (in shares)	0
Series A-2 Preferred Stock
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)	7,500
Preferred Stock, shares issued (in shares)	32
Preferred Stock, shares outstanding (in shares)	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 (in shares)	2,514
Conversion of preferred stock adjustment (in dollars per share)	$ 0
Preferred stock, cumulative dividend percentage rate (per annum)	5.00%
Series D Preferred Stock
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)	4,000
Preferred Stock, shares issued (in shares)	0
Preferred Stock, shares outstanding (in shares)	0
Preferred Stock
Class of Stock [Line Items]
Preferred Stock, shares authorized (in shares)	5,000,000