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Income Taxes - Summary of Net Operating Loss Carryforwards (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Operating Loss Carryforwards [Line Items]      
Valuation Allowance $ (469) $ (2) $ (6)
Carryforward 61,922    
Deferred Tax Asset 14,019    
Valuation Allowance (13,719)    
NOL Carryforward [Member]      
Operating Loss Carryforwards [Line Items]      
Carryforward 37,394    
Deferred Tax Asset 8,868    
Valuation Allowance (8,568)    
NOL Carryforward [Member] | Foreign Tax Authority [Member]      
Operating Loss Carryforwards [Line Items]      
Carryforward 3,850    
Deferred Tax Asset 1,241    
Valuation Allowance (1,056)    
NOL Carryforward [Member] | Canada Revenue Agency [Member]      
Operating Loss Carryforwards [Line Items]      
Carryforward 28,691    
Deferred Tax Asset 7,379    
Valuation Allowance $ (7,379)    
Expiration 2027    
Expiration 2035    
NOL Carryforward [Member] | Internal Revenue Service (IRS) [Member]      
Operating Loss Carryforwards [Line Items]      
Carryforward $ 4,853    
Deferred Tax Asset 248    
Valuation Allowance $ (133)    
Expiration 2019    
Expiration 2027    
Other Carryforwards [Member]      
Operating Loss Carryforwards [Line Items]      
Carryforward $ 24,528    
Deferred Tax Asset 5,151    
Valuation Allowance (5,151)    
Other Carryforwards [Member] | Foreign Tax Authority [Member]      
Operating Loss Carryforwards [Line Items]      
Carryforward 2,846    
Deferred Tax Asset 967    
Valuation Allowance $ (967)    
Expiration 2016    
Expiration 2022    
Other Carryforwards [Member] | Canada Revenue Agency [Member]      
Operating Loss Carryforwards [Line Items]      
Carryforward $ 21,682    
Deferred Tax Asset 4,184    
Valuation Allowance $ (4,184)