XML 75 R58.htm IDEA: XBRL DOCUMENT v3.7.0.1
Income Taxes - Summary of Net Operating Loss Carryforwards (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
Operating Loss Carryforwards [Line Items]  
Carryforward $ 74,927
NOL Carryforward [Member]  
Operating Loss Carryforwards [Line Items]  
Carryforward 58,110
NOL Carryforward [Member] | Foreign Tax Authority [Member]  
Operating Loss Carryforwards [Line Items]  
Carryforward 3,101
NOL Carryforward [Member] | Canada Revenue Agency [Member]  
Operating Loss Carryforwards [Line Items]  
Carryforward $ 39,375
Expiration 2024
Expiration 2036
NOL Carryforward [Member] | Internal Revenue Service (IRS) [Member]  
Operating Loss Carryforwards [Line Items]  
Carryforward $ 15,634
Expiration 2017
Expiration 2036
Other Carryforwards [Member]  
Operating Loss Carryforwards [Line Items]  
Carryforward $ 16,817
Other Carryforwards [Member] | Foreign Tax Authority [Member]  
Operating Loss Carryforwards [Line Items]  
Carryforward $ 1,934
Expiration 2017
Expiration 2018
Other Carryforwards [Member] | Canada Revenue Agency [Member]  
Operating Loss Carryforwards [Line Items]  
Carryforward $ 14,883