Warrants (Tables)

9 Months Ended

Sep. 30, 2015

Rollforward of Preferred Stock Warrants

The following represents a summary of the warrants outstanding at each of the dates identified:

							Number of Shares Underlying Warrants
Warrants	Issue Date		Classification		Exercisable For		September 30, 2015		December 31, 2014
Preferred Stock Warrants		Various		Liability		Preferred Stock		—		14,544,247
Private Placement Warrants		June 15, 2015		Equity		Common Stock		3,190,030		—
Hercules Warrants		June 15, 2015		Equity		Common Stock		25,150		—
MTS Warrants		August 31, 2015		Equity		Common Stock		30,000		—
Warrants Assumed in Merger
Series A Warrants		March - May 2015		Equity		Common Stock		1,219,000		—
Representative’s Warrants		March 2015		Equity		Common Stock		37,100		—
Underwriter’s Warrant		March 2015		Equity		Common Stock		2,160		—

Preferred Stock Warrants [Member]

Rollforward of Preferred Stock Warrants

A rollforward of the Preferred Stock Warrants is as follows:

	Preferred Stock Warrants			Estimated Fair Value
Balance — December 31, 2014		14,544,247		$	1,309
Decrease in estimated fair value of warrants		—			(1,309	)
Cancellation and gain (loss) on extinguishment		(14,544,247	)		—
Balance — September 30, 2015		—		$	—