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Spin-out transaction of the mining activities - Disclosure of deemed consideration paid for the deemed acquisition of Barolo (Details) - Barolo Ventures Corp [Member]
$ in Thousands
 12 Months Ended
Dec. 31, 2020
CAD ($)
shares
Disclosure of Spin-out transaction of the mining activities [Line Items]  
Common shares of Osisko Development deemed issued $ 1,751
Number of common shares issued under reverse take over transaction | shares 233,395
Transaction fees $ 500
Deemed consideration paid 2,251
Net liabilities deemed assumed  
Net liabilities of Barolo (164)
Net cost of listing $ 2,415