Capitalization - Class B-1 and B-2 Preferred Stock (Details) - USD ($)				12 Months Ended
	May 04, 2015	Mar. 07, 2014	Jan. 30, 2014	Dec. 31, 2015	Dec. 31, 2014
PBM Capital Investments, LLC | Class B-2 Warrant and Class B-2 Milestone Warrant
Capitalization
Warrants, term (in years)	10 years
PBM Capital Investments, LLC | Class B Note
Capitalization
Face amount			$ 500,000
Stock option, exercise price (in dollars per share)			$ 2.47
Class B-1 Preferred Stock
Capitalization
Shares issued (in shares)				1,011,721	809,385
Preferred Stock | Class B-1 Preferred Stock
Capitalization
Certification period (in days)			10 days
Preferred Stock | Class B-1 Preferred Stock | PBM Capital Investments, LLC
Capitalization
Option to purchase shares, number (in shares)			809,385
Stock option, exercise price (in dollars per share)			$ 2.47
Shares issued (in shares)		1,011,721	1,011,721
Share price (in dollars per share)		$ 2.47
Cash proceeds		$ 2,000,000
Preferred Stock | Class B-1 Preferred Stock | PBM Capital Investments, LLC | Class B-2 Milestone Warrant
Capitalization
Cash proceeds	$ 2,500,000
Preferred Stock | Class B-1 Preferred Stock | PBM Capital Investments, LLC | Class B Note
Capitalization
Share price (in dollars per share)			$ 2.47
Preferred Stock | Class B-2 Preferred Stock | PBM Capital Investments, LLC
Capitalization
Warrant to purchase shares, number (in shares)			163,278
Preferred Stock | Class B-2 Preferred Stock | PBM Capital Investments, LLC | Class B-2 Warrant
Capitalization
Warrant to purchase shares, number (in shares)		130,623	130,623
Warrants, exercise price (in dollars per share)		$ 2.57	$ 2.57
Preferred Stock | Class B-2 Preferred Stock | PBM Capital Investments, LLC | Class B Note | Class B-2 Warrant
Capitalization
Warrant to purchase shares, number (in shares)		32,652
Warrants, exercise price (in dollars per share)		$ 2.57