Related Parties (Details) $ / shares in Units, $ in Thousands						12 Months Ended
	Sep. 14, 2017 shares	Jun. 06, 2017 shares $ / shares	Nov. 04, 2015 USD ($)	Jun. 22, 2015 USD ($) shares $ / shares	Jul. 21, 2014 USD ($) shares $ / shares	Dec. 31, 2017 USD ($) shares Director $ / shares	Dec. 31, 2016 USD ($)	Sep. 13, 2017 USD ($)
Related Party Transaction [Line Items]
Loss on extinguishment of debentures						$ (11,799)	$ 0
Number of directors | Director						2
Related parties general and administrative expenses						$ 180	240
Series C Convertible Preferred Stock [Member]
Related Party Transaction [Line Items]
Aggregate principal amount of debt								$ 40,465
Number of shares debt convertible (in shares) | shares						15,049,000
Initial conversion price (in dollars per share) | $ / shares						$ 2.69
Senior Secured 2.25% Convertible Debentures [Member]
Related Party Transaction [Line Items]
Aggregate principal amount of debt						$ 32,500
Number of shares debt convertible (in shares) | shares						8,666,668
Interest rate						2.25%
Initial conversion price (in dollars per share) | $ / shares						$ 3.75
Maturity period						5 years
Maturity date						Jun. 30, 2021
Senior Secured 4% Convertible Debentures [Member]
Related Party Transaction [Line Items]
Aggregate principal amount of debt					$ 15,000	$ 15,000
Number of shares debt convertible (in shares) | shares					1,169,595
Interest rate		4.00%				4.00%
Initial conversion price (in dollars per share) | $ / shares					$ 12.825
Maturity period						5 years
Maturity date						Jun. 30, 2021
Debt conversion, converted instrument, issued (in shares) | shares						70,000
Senior Secured 2.25% Convertible Debentures and Senior Secured 4% Convertible Debentures [Member] | Series C Convertible Preferred Stock [Member]
Related Party Transaction [Line Items]
Number of shares debt convertible (in shares) | shares		15,049,000
Initial conversion price (in dollars per share) | $ / shares		$ 2.69
Debt conversion, converted instrument, issued (in shares) | shares	40,482
Sabby Management LLC and Broadfin LLC [Member]
Related Party Transaction [Line Items]
Number of shares underlying warrants (in shares) | shares				600,000
Exercise price of warrants (in dollars per share) | $ / shares				$ 3.75
Sabby Management LLC and Broadfin LLC [Member] | Senior Secured 2.25% Convertible Debentures [Member]
Related Party Transaction [Line Items]
Exercise price of warrants (in dollars per share) | $ / shares				$ 3.75
Aggregate principal amount of debt				$ 32,500
Number of shares debt convertible (in shares) | shares				8,666,668
Interest rate				2.25%
Initial conversion price (in dollars per share) | $ / shares				$ 3.75
Maturity period						5 years
Maturity date						Jun. 30, 2021
Two Board Directors [Member]
Related Party Transaction [Line Items]
Up-front fee paid			$ 40
Monthly retainer fee						$ 10	$ 10
Olympic Media [Member]
Related Party Transaction [Line Items]
Up-front fee paid						$ 30
Period of written notice without penalty						10 days