Debt - Loan and Security Agreement (Details)		1 Months Ended		12 Months Ended
	Jul. 20, 2016 USD ($) $ / shares shares	Nov. 30, 2015	Jun. 30, 2014 USD ($) intangible_asset shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($)	Jun. 30, 2015 $ / shares shares	Dec. 31, 2014 USD ($)
Debt
Value of warrants recorded as debt discount and additional paid in capital	$ 148,885			$ 148,885			$ 235,857
Current portion of long-term debt				2,360,109	$ 5,225,818
Amount borrow, long-term liabilities				$ 14,176,359	11,246,188
Secured Debt
Debt
Number of common shares that can be purchased upon exercise of warrant | shares	42,735		30,992	73,727
Exercise price of warrants (in dollars per share) | $ / shares	$ 4.84
Warrant Exercisable Term	10 years
Current portion of debt discount				$ 265,995
Long-term debt discount				$ 248,346
Loan and Security Agreement
Debt
Interest rate at end of period				5.00%
Accrued interest				$ 32,501
Future maturities of long-term debt
2017				626,104
2018				626,104
2019				573,929
Total principal				1,826,137
Plus final fee premium accretion				32,501
Total long-term obligations				1,858,638
Interest expenses recorded				$ 111,293
Loan and Security Agreement | Secured Debt
Debt
Face value of term loan			$ 15,000,000
Number of banks with which agreement is entered | intangible_asset			2
Interest rate at end of period				7.50%
Number of common shares that can be purchased upon exercise of warrant | shares						85,470
Exercise price of warrants (in dollars per share) | $ / shares						$ 3.51
Exercisable term			10 years
Value of warrants recorded as debt discount and additional paid in capital			$ 235,857	$ 148,885
Amortized portion of final fee upon repayment				1,125,000
Current portion of long-term debt				1,734,005
Amount borrow, long-term liabilities				12,943,825
Accrued interest				192,171
Future maturities of long-term debt
2017					2,000,000
2018					6,000,000
2019					6,000,000
2020					1,000,000
Total principal					15,000,000
Less discount					(514,341)
Plus final fee premium accretion					192,171
Total long-term obligations					$ 14,677,830
Interest expenses recorded				$ 1,563,049
Loan and Security Agreement | Secured Debt | Minimum
Debt
Interest rate (as a percent)	7.25%
Pre-payment fees (as a percent)				1.00%
Loan and Security Agreement | Secured Debt | Maximum
Debt
Pre-payment fees (as a percent)				3.00%
Prime Rate | Loan and Security Agreement
Debt
Interest rate above reference rate		1.25%
Prime Rate | Loan and Security Agreement | Secured Debt
Debt
Interest rate above reference rate	3.75%