Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.6.0.2
Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Taxes [Line Items]      
U.S. federal statutory tax rate 34.00% 34.00% 34.00%
Valuation allowance $ 9,028,241 $ 11,103,399  
Net change in total valuation allowance $ (2,075,158)    
Cumulative change in ownership percentage 50.00%    
Period for cumulative change in ownership 3 years    
Changes in liability for uncertain tax benefits $ 0    
Income tax interest and penalties accrued 0 $ 0  
Income tax interest and penalties 0    
CALIFORNIA      
Income Taxes [Line Items]      
Net operating loss carry forwards $ 7,873,156    
Net operating loss carry forwards, expire period 2017    
Federal      
Income Taxes [Line Items]      
Net operating loss carry forwards $ 17,914,514    
Net operating loss carry forwards, expire period 2020    
Tax credit carry forwards $ 1,716,398    
Tax credit carry forwards, expire period 2026    
State      
Income Taxes [Line Items]      
Tax credit carry forwards $ 1,346,874