Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Revenue	$ 475,000	$ 409,000
Operating expenses
Research and development	3,992,000	5,805,000
General and administrative	6,421,000	6,850,000
Severance expense	289,000	1,864,000
Total operating expenses	10,702,000	14,519,000
Loss from operations	(10,227,000)	(14,110,000)
Other income (expense)
Change in fair value of warrant liability	610,000	9,455,000
Change in fair value of Preferred B stock derivative liability	9,330,000	27,764,000
Other expense	302,000
Other income (expense), net	9,638,000	37,219,000
(Loss) income before taxes	(589,000)	23,109,000
Income tax benefit	73,000
Net income	(516,000)	23,109,000
Accretion of Series B redeemable convertible preferred stock	(10,278,000)	(1,285,000)
Net (loss) income attributable to common stockholders	$ (10,794,000)	$ 15,757,000
Per share information:
Net (loss) income per share of common stock - basic	$ (1.99)	$ 4.21
Weighted average number of shares of common stock outstanding - basic	5,411,204	3,746,639
Net (loss) income per share of common stock - diluted	$ (1.99)	$ (2.33)
Weighted average number of shares of common stock outstanding - diluted	5,411,204	5,886,730
Scenario, Previously Reported [Member]
Other income (expense)
Net (loss) income attributable to common stockholders		$ 21,824,000
Per share information:
Net (loss) income per share of common stock - basic		$ 5.82
Weighted average number of shares of common stock outstanding - basic		3,746,639
Net (loss) income per share of common stock - diluted		$ 3.37
Weighted average number of shares of common stock outstanding - diluted		6,472,093