Stockholders' Equity (Deficit) - Stock Purchase Warrants (Details) - Stock Purchase Warrants - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2014
Interest Expense
Stock Purchase Warrants
Accretion of debt discount		$ 12,683	$ 27,010	$ 15,488	$ 41,065
Amended and Restated Loan and Security Agreement | Common Stock
Stock Purchase Warrants
Term of stock purchase warrants	10 years
Number of shares called by warrants	116,581	116,581		116,581
Exercise price of warrant (in dollars per share)	$ 3.86	$ 3.86		$ 3.86
Amended and Restated Loan and Security Agreement | Term Loans | Warrant liability
Stock Purchase Warrants
Warrant liability	$ 304,113	$ 304,113		$ 304,113
Oxford Notes
Stock Purchase Warrants
Term of stock purchase warrants						10 years
Oxford Notes | Common Stock
Stock Purchase Warrants
Number of shares called by warrants						167,570
Exercise price of warrant (in dollars per share)						$ 1.79
Oxford Notes | Warrant liability
Stock Purchase Warrants
Warrant liability						$ 205,150