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Prepaid expenses and deposits (Tables)
12 Months Ended
Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of prepaid expenses and deposits
Current:
 
 
 
 
  
 
December 31, 2015

 
December 31, 2014

Prepaid insurance and deposits
 
$
625

 
$
968

Prepaid lease payments
 
242

 
537

Prepaid interest
 
815

 
748

 
 
$
1,682

 
$
2,253

 
 
 
 
 
Long term:
 
 
 
 
  
 
December 31, 2015

 
December 31, 2014

Prepaid lease payments (note 11(a))
 
$
1,834

 
$
1,953