Related Parties (Details) $ / shares in Units, $ in Thousands				3 Months Ended
	Sep. 14, 2017 shares	Nov. 04, 2015 USD ($)	Jun. 22, 2015 USD ($) shares $ / shares	Mar. 31, 2018 USD ($) Director $ / shares	Dec. 31, 2017 $ / shares	Sep. 13, 2017 USD ($)	Jun. 06, 2017
Related Party Transaction [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.10	$ 0.10
Number of directors | Director				2
Series C Convertible Preferred Stock [Member]
Related Party Transaction [Line Items]
Aggregate principal amount of debt						$ 40,465
Senior Secured 4% Convertible Debentures [Member]
Related Party Transaction [Line Items]
Interest rate							4.00%
Maturity date				Jul. 30, 2021
Senior Secured 2.25% Convertible Debentures and Senior Secured 4% Convertible Debentures [Member] | Series C Convertible Preferred Stock [Member]
Related Party Transaction [Line Items]
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
Initial conversion price (in dollars per share) | $ / shares			$ 3.75
Interest rate			2.25%
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
Olympic Media [Member]
Related Party Transaction [Line Items]
Up-front fee paid				$ 13
Period of written notice without penalty				10 days