Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net loss attributable to common stockholders for basic earnings per share	$ (9,429,000)	$ (3,447,000)	$ (8,550,000)	$ (29,993,000)					$ (51,419,000)	$ (13,885,800)
less: change in fair value of warrant liability attributable to outstanding warrants issued to PLTG										(105,200)
Net loss for diluted earnings per share attributable to common stockholders									$ (51,419,000)	$ (13,991,000)
Denominator:
Weighted average basic common shares outstanding (in shares)					1,466,402	1,302,316	1,279,267	1,229,504	1,767,957	1,318,813
Assumed conversion of dilutive securities:
Warrants to purchase common stock
Potentially dilutive common shares assumed converted
Denominator for diluted earnings per share - adjusted weighted average shares					1,466,402	1,302,316	1,299,115	1,229,504	1,767,957	1,318,813
Basic net loss attributable to common stockholders per common share					$ (4.24)	$ (0.84)	$ (1.58)	$ (3.70)	$ (29.08)	$ (10.53)
Diluted net loss attributable to common stockholders per common share					$ (4.24)	$ (1.08)	$ (1.90)	$ (3.70)	$ (29.08)	$ (10.61)