Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.6.0.2
Income Taxes - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Jun. 30, 2009
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2013
Dec. 31, 2014
Income Tax Disclosure [Line Items]          
Valuation Allowance   $ 33,787,134 $ 31,199,403    
Net change in valuation allowance related to deferred tax assets   2,587,731 4,271,483    
Federal and state tax net operating loss carryforwards   $ 87,663,000      
Federal and state tax loss carryforward expiration date   Dec. 31, 2036      
Change in ownership 50.00%     50.00%  
Annual amount of pre-change net operating losses $ 417,000     $ 3,540,000  
Additional unrecognized tax benefits   $ 166,871 353,814    
Tax positions   1,875,337 1,708,466   $ 1,354,652
Interest and penalties   0 $ 0    
Research and Development Tax Credit [Member]          
Income Tax Disclosure [Line Items]          
Federal research and development tax credit carryforwards   $ 1,875,000      
Federal tax credit carryforward   Dec. 31, 2026