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Provisions and other liabilities
 12 Months Ended
Dec. 31, 2021
Disclosure of other provisions [Abstract]  
Provisions and other liabilities [Text Block]

19. Provisions and other liabilities

                      Year ended                 Year ended  
                December 31, 2021           December 31, 2020  
                Deferred                          
                premium on                          
    Environmental     Lease     flow-through           Environmental     Lease        
    rehabilitation(i)     liabilities(ii)     shares (iii)     Total     Rehabilitation(i)     liabilities(ii)     Total  
    $     $     $     $     $     $     $  
                                           
Balance - Beginning of period   34,601     11,366     -     45,967     20,527     10,127     30,654  
                                           
Acquisition of the San                                          
Antonio gold project (Note 7)   -     -     -     -     9,301     -     9,301  
New liabilities   20,433     13,578     -     34,011     4,176     2,394     6,570  
Revision of estimates   (1,457 )   -     -     (1,457 )   (310 )   -     (310 )
Accretion   1,192     -     -     1,192     820     -     820  
Settlement/payments of                                          
liabilities   (1,240 )   (6,582 )   -     (7,822 )   (500 )   (1,155 )   (1,655 )
Issuance of flow-through shares   -     -     7,885     7,885     -     -     -  
Recognition of deferred premium                                          
on flow-through shares   -     -     (6,971 )   (6,971 )   -     -     -  
Currency translation                                          
adjustments   (292 )   -     -     (292 )   587     -     587  
Balance - End of period   53,237     18,362     914     72,513     34,601     11,366     45,967  
                                           
Current portion   2,287     8,978     914     12,179     3,019     1,412     4,431  
Non-current portion   50,950     9,384     -     60,334     31,582     9,954     41,536  
    53,237     18,362     914     72,513     34,601     11,366     45,967  

(i) The environmental rehabilitation provision represents the legal and contractual obligations associated with the eventual closure of the Company's mining interests, plant and equipment and exploration and evaluation assets (mostly for the Cariboo property, Bonanza Ledge Phase 2 project and San Antonio project). As at December 31, 2021, the estimated inflation-adjusted undiscounted cash flows required to settle the environmental rehabilitation amounts to $60.5 million. The weighted average actualization rate used is 3.4% and the disbursements are expected to be made from 2021 to 2030 as per the current closure plans.

(ii) The lease liabilities are mainly related to leases for mining equipment and for office space.

(iii) The flow-through shares issuance by Osisko Development is described in Note 21.