Annual report pursuant to Section 13 and 15(d)

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]      
Net operating loss carry forwards expire Dec. 31, 2029    
Valuation allowance, decreased $ 0 $ 2,240,800 $ 174,000
Valuation allowance   0  
Unrecognized tax benefits 0 0 0
Accrued interest or penalties related to uncertain tax positions 0 0 0
Federal [Member]      
Income Taxes [Line Items]      
Net operating loss carry forward 50,600,000 7,000,000 8,200,000
State [Member]      
Income Taxes [Line Items]      
Net operating loss carry forward $ 22,600,000 $ 500,000 $ 2,300,000