Income Taxes - Difference in Actual Income Tax Expense Computed by Applying the Statutory Federal Income Tax Rate to Loss Before Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Line Items]
Computed tax (benefit) at 34%	$ (7,271,785)	$ (4,745,859)
State taxes, net of federal benefit	(918,079)	(233,632)
Stock-based compensation	102,699	59,119
Expiring state net operating loss ("NOL") carryforwards	(20,086)	131,342
Return to provision	(27,934)	(4,269)
Other	44,679	37,969
Change in valuation reserve	8,743,589	4,787,274
Total income tax expense	10,189
State
Income Tax Disclosure [Line Items]
Research and development tax credit	(300,213)	(20,720)
Federal
Income Tax Disclosure [Line Items]
Research and development tax credit	$ (342,681)	$ (11,224)