Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.3.1.900
Income Taxes - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Jun. 30, 2009
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Line Items]        
Valuation Allowance   $ 31,199,403 $ 26,927,920  
Net change in valuation allowance related to deferred tax assets   4,271,483 2,052,871  
Federal and state tax net operating loss carryforwards   $ 81,059,000    
Federal and state tax loss carryforward expiration date   Dec. 31, 2035    
Change in ownership 50.00%     50.00%
Annual amount of pre-change net operating losses $ 417,000     $ 3,540,000
Additional unrecognized tax benefits   $ 353,814 112,871  
Tax positions   1,708,466 1,354,652 $ 1,241,781
Interest and penalties   0 $ 0  
Research and Development Tax Credit [Member]        
Income Tax Disclosure [Line Items]        
Federal research and development tax credit carryforwards   $ 1,708,000    
Federal tax credit carryforward   Dec. 31, 2025