Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Reconciliation of Income Tax Provision to Statutory Federal Income Tax Rate (Detail)

v3.6.0.2
Income Taxes - Schedule of Reconciliation of Income Tax Provision to Statutory Federal Income Tax Rate (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]      
Income taxes at statutory rates $ 1,272,242 $ (91,705) $ 1,222,120
State income tax, net of federal benefit 2,054 411 4,132
Permanent items 171,704 171,963 111,001
Section 382 limitation expiration     1,712,466
Warrant liability (156,498) (34,160) (947,432)
Federal NOL expired (206,133)    
Other 11,104    
Research and development credit (141,494) 628,573 (143,114)
Change in federal valuation allowance (944,798) (674,460) (1,953,002)
Total tax provision $ 8,181 $ 622 $ 6,171