Stock-based Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended			3 Months Ended	12 Months Ended	84 Months Ended
	Jul. 17, 2014	Jan. 17, 2014	Nov. 30, 2013	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2014
Share Based Compensation [Line Items]
Allocated Share-based Compensation Expense					$ 8.7
Stock Issued During Period, Shares, New Issues		5,101,366	5,630,208	316,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition					2 years
Warrants Issued During Period	2,325,467					14,261,000
Warrants Expiration Period	5 years
Warrants Initial Exercise Price	$ 4.00
Investment Warrants, Exercise Price	$ 3.08		$ 6.00	$ 4.29	$ 3.80
Lock Up Agreement Description					The Company also entered into a Lock-Up Agreement with Cognate BioServices on January 17, 2014, under which Cognate BioServices agreed to have all of the shares that are issued as part of the Cognate BioServices Agreements (“Lock-Up Shares”) locked up for up to 36 months, in return for 15% warrant coverage for each 6-month period of lock-up, on the same terms as the warrants in the Cognate BioServices Agreements. During the lock-ups, the Lock-Up Shares may not be sold or traded on the market. These lock-up terms are subject to the same most favored nation treatment as provided in the Cognate BioServices Agreements, as described in Note 1.