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Other long term obligations (Tables)
 12 Months Ended
Dec. 31, 2016
Other Liabilities Disclosure [Abstract]  
Schedule of other long term obligations
Other long term obligations are as follows:
 
 
December 31, 2016

 
December 31, 2015

Deferred lease inducements liability (note 16(b))
 
$
38

 
$
145

Asset retirement obligation (note 16(c))
 
678

 
617

Restricted share unit plan (note 21(d))
 
—

 
671

Directors' deferred stock unit plan (note 21(f))
 
4,945

 
2,246

Deferred gain on sale leaseback (note 16(d))
 
3,199

 
780

 
 
$
8,860

 
$
4,459

Less current portion of:
 
 
 
 
Restricted share unit plan (note 21(d))
 
—

 
(671
)
Deferred gain on sale leaseback (note 16(d))
 
(586
)
 
(221
)
 
 
$
8,274

 
$
3,567
Schedule of changes in deferred lease inducements
 
 
December 31, 2016

 
December 31, 2015

Balance, beginning of year
 
$
145

 
$
252

Amortization of deferred lease inducements
 
(107
)
 
(107
)
Balance, end of year
 
$
38

 
$
145
Schedule of changes in asset retirement obligation
The following table presents a continuity of the liability for the asset retirement obligation:
 
 
December 31, 2016

 
December 31, 2015

Balance, beginning of year
 
$
617

 
$
562

Accretion expense
 
61

 
55

Balance, end of year
 
$
678

 
$
617
Schedule of deferred lease inducement assets
 
 
December 31, 2016

 
December 31, 2015

Balance, beginning of year
 
$
780

 
$
371

Addition
 
2,792

 
512

Amortization of deferred gain on sale leaseback
 
(373
)
 
(103
)
Balance, end of year
 
$
3,199

 
$
780