Notes Payable and Stock Purchase Warrants - Term Notes Payable (Details) - Amended and Restated Loan and Security Agreement	Jun. 30, 2016 USD ($) $ / shares shares
Term Notes Payable
Long term debt
Issuance costs | $	$ 568,648
Final prepayment fee (as a percent)	9.00%
Term Notes Payable | Warrant liability | Stock Purchase Warrants
Long term debt
Warrant liability | $	$ 526,209
Term Notes Payable | Warrant liability | Common Stock | Stock Purchase Warrants, $3.86 Exercise Price
Long term debt
Term of stock purchase warrants	10 years
Number of shares called by warrants | shares	116,581
Exercise price of warrant (in dollars per share) | $ / shares	$ 3.86
Term Notes Payable | Warrant liability | Common Stock | Stock Purchase Warrants, $2.38 Exercise Price
Long term debt
Term of stock purchase warrants	10 years
Number of shares called by warrants | shares	63,025
Exercise price of warrant (in dollars per share) | $ / shares	$ 2.38
Term Notes Payable | Warrant liability | Common Stock | Stock Purchase Warrants, $1.86 Exercise Price
Long term debt
Term of stock purchase warrants	10 years
Number of shares called by warrants | shares	80,645
Exercise price of warrant (in dollars per share) | $ / shares	$ 1.86
Tranche 4 Term Loan
Long term debt
Non-utilization fee (as a percent)	2.00%