Related Parties (Details) $ / shares in Units, $ in Thousands				6 Months Ended
	Jun. 06, 2017 USD ($) shares $ / shares	Nov. 04, 2015 USD ($)	Jul. 21, 2014 USD ($) shares $ / shares	Jun. 30, 2017 USD ($) shares Director $ / shares	Dec. 31, 2016 $ / shares	Sep. 30, 2015 $ / shares
Related Party Transaction [Line Items]
Aggregate principal amount of debt | $				$ 40,465
Preferred stock, stated value (in dollars per share) | $ / shares				$ 0.10	$ 0.10
Number of Directors | Director				2
Senior Secured 2.25% Convertible Debentures [Member]
Related Party Transaction [Line Items]
Aggregate principal amount of debt | $				$ 32,500
Interest rate				2.25%
Number of shares debt convertible (in shares) | shares				8,666,668
Initial conversion price (in dollars per share) | $ / shares				$ 3.75
Maturity period				5 years
Maturity date				Jun. 30, 2021
Senior Secured 2.25% Convertible Debentures [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Initial conversion price (in dollars per share) | $ / shares				$ 6.90
Senior Secured 4% Convertible Debentures [Member]
Related Party Transaction [Line Items]
Aggregate principal amount of debt | $			$ 15,000	$ 15,000
Interest rate				4.00%
Number of shares debt convertible (in shares) | shares			1,169,595
Initial conversion price (in dollars per share) | $ / shares			$ 12.825
Maturity period				5 years
Maturity date				Jul. 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]
Related Party Transaction [Line Items]
Aggregate principal amount of debt | $	$ 40,652
Debt instrument, interest payment | $	$ 4,000
Number of years for interest payments				4 years
Number of days for approval				2 days
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	15,099,000
Initial conversion price (in dollars per share) | $ / shares	$ 2.69
Debt conversion, converted instrument, issued (in shares) | shares	40,616
Preferred stock, stated value (in dollars per share) | $ / shares	$ 1,000
Senior Secured 2.25% Convertible Debentures and Senior Secured 4% Convertible Debentures [Member] | Series C Convertible Preferred Stock [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Beneficial ownership percentage	9.99%
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
Percentage of liquidated damages payable				2.00%
Percentage of aggregate liquidated damages payable				12.00%
Interest rate payable on liquidated damages				12.00%
Percentage of issued and outstanding common stock payable upon conversion				9.99%
Sabby Management LLC and Broadfin LLC [Member] | Senior Secured 2.25% Convertible Debentures [Member]
Related Party Transaction [Line Items]
Aggregate principal amount of debt | $				$ 32,500
Interest rate				2.25%
Number of shares debt convertible (in shares) | shares				8,666,668
Initial conversion price (in dollars per share) | $ / shares				$ 3.75		$ 3.75
Maturity period				5 years
Maturity date				Jun. 30, 2021
Two Board Directors [Member]
Related Party Transaction [Line Items]
Up-front fee paid | $		$ 40,000
Monthly retainer fee | $				$ 10,000