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Lease Obligations (Details)
$ in Millions
12 Months Ended
Apr. 30, 2002
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2016
CAD
Dec. 31, 2016
USD ($)
Schedule of Capital and Operating Leased Assets [Line Items]            
Operating Leases, Rent Expense   $ 1.1 $ 1.3 $ 1.3    
Term of capital lease (in years) 20 years          
Future minimum annual payments due under sale leaseback until April 2017 | CAD         CAD 409,500  
Future minimum annual payments due under sale leaseback from May 2017 until April 2022 | CAD         CAD 452,340  
Property and Equipment [Member]            
Schedule of Capital and Operating Leased Assets [Line Items]            
Assets recorded under capital lease obligations     2.7     $ 2.8
Accumulated depreciation related to assets under capital lease obligations     $ 1.6     $ 1.8