Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Tax Credit Carryforward [Line Items]
Increase in valuation allowance		$ 4,197,344	$ 712,739	$ 3,161,558
Net operating losses expiration date		expire in 2022 and 2016
Proceeds from licensing intellectual property	$ 11,000,000
Federal
Tax Credit Carryforward [Line Items]
Income tax net operating loss carryforwards		$ 50,100,000
California
Tax Credit Carryforward [Line Items]
Income tax net operating loss carryforwards		$ 50,100,000