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]      
State and Canadian net operating losses (NOLs) $ 6,400,000 $ 5,700,000  
State and Canadian net operating losses (NOLs), expiration year 2019    
Valuation allowance, deferred tax assets $ 1,700,000 1,300,000  
Change in valuation allowance, deferred tax assets $ 412,000 $ 583,000 $ 442,000
Tax computed at federal rate, percentage 35.00% 35.00% 35.00%
Tax benefit related to settlement of DSUs, RSUs and RSAs $ 2,711,000 $ 6,173,000 $ 4,310,000
Uncertain tax positions 0 0  
Unrecognized tax benefits related interest or penalties $ 0 $ 0  
Income Tax Examination, Description The Company is not currently under income tax examination by any taxing authorities.    
Undistributed earnings of foreign subsidiary $ 0    
Minimum [Member]      
Income Taxes [Line Items]      
Open tax years subject to tax examinations 2012    
Maximum [Member]      
Income Taxes [Line Items]      
Open tax years subject to tax examinations 2016