XML 78 R54.htm IDEA: XBRL DOCUMENT v3.24.0.1
Fair value measurements - Recurring fair value measurements (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Disclosure of fair value measurement of assets [line items]    
Assets $ 378,835 $ 383,748
Recurring fair value measurements | Current investments    
Disclosure of fair value measurement of assets [line items]    
Assets 2,232 3,348
Recurring fair value measurements | Current investments | Level 1    
Disclosure of fair value measurement of assets [line items]    
Assets 708 1,012
Recurring fair value measurements | Current investments | Level 2    
Disclosure of fair value measurement of assets [line items]    
Assets 44 804
Recurring fair value measurements | Current investments | Level 3    
Disclosure of fair value measurement of assets [line items]    
Assets 1,480 1,532
Recurring fair value measurements | Public equities and share purchase warrants    
Disclosure of fair value measurement of assets [line items]    
Assets 754 1,863
Recurring fair value measurements | Public equities and share purchase warrants | Level 1    
Disclosure of fair value measurement of assets [line items]    
Assets 708 1,012
Recurring fair value measurements | Public equities and share purchase warrants | Level 2    
Disclosure of fair value measurement of assets [line items]    
Assets 44 804
Recurring fair value measurements | Public equities and share purchase warrants | Level 3    
Disclosure of fair value measurement of assets [line items]    
Assets 2 47
Recurring fair value measurements | Private holdings    
Disclosure of fair value measurement of assets [line items]    
Assets 1,478 1,485
Recurring fair value measurements | Private holdings | Level 1    
Disclosure of fair value measurement of assets [line items]    
Assets 0 0
Recurring fair value measurements | Private holdings | Level 2    
Disclosure of fair value measurement of assets [line items]    
Assets 0 0
Recurring fair value measurements | Private holdings | Level 3    
Disclosure of fair value measurement of assets [line items]    
Assets 1,478 1,485
Recurring fair value measurements | Total Co-investments    
Disclosure of fair value measurement of assets [line items]    
Assets 93,528 73,573
Recurring fair value measurements | Total Co-investments | Level 1    
Disclosure of fair value measurement of assets [line items]    
Assets 15,357 10,279
Recurring fair value measurements | Total Co-investments | Level 2    
Disclosure of fair value measurement of assets [line items]    
Assets 78,171 63,294
Recurring fair value measurements | Total Co-investments | Level 3    
Disclosure of fair value measurement of assets [line items]    
Assets 0 0
Recurring fair value measurements | Co-investments    
Disclosure of fair value measurement of assets [line items]    
Assets 93,528 73,573
Recurring fair value measurements | Co-investments | Level 1    
Disclosure of fair value measurement of assets [line items]    
Assets 15,357 10,279
Recurring fair value measurements | Co-investments | Level 2    
Disclosure of fair value measurement of assets [line items]    
Assets 78,171 63,294
Recurring fair value measurements | Co-investments | Level 3    
Disclosure of fair value measurement of assets [line items]    
Assets 0 0
Recurring fair value measurements | Total Other assets    
Disclosure of fair value measurement of assets [line items]    
Assets 18,851 15,079
Recurring fair value measurements | Total Other assets | Level 1    
Disclosure of fair value measurement of assets [line items]    
Assets 1,706 3,248
Recurring fair value measurements | Total Other assets | Level 2    
Disclosure of fair value measurement of assets [line items]    
Assets 13,733 8,053
Recurring fair value measurements | Total Other assets | Level 3    
Disclosure of fair value measurement of assets [line items]    
Assets 3,412 3,778
Recurring fair value measurements | Digital gold strategies    
Disclosure of fair value measurement of assets [line items]    
Assets 3,412 3,778
Recurring fair value measurements | Digital gold strategies | Level 1    
Disclosure of fair value measurement of assets [line items]    
Assets 0 0
Recurring fair value measurements | Digital gold strategies | Level 2    
Disclosure of fair value measurement of assets [line items]    
Assets 0 0
Recurring fair value measurements | Digital gold strategies | Level 3    
Disclosure of fair value measurement of assets [line items]    
Assets 3,412  
Recurring fair value measurements | Assets attributable to non-controlling interest    
Disclosure of fair value measurement of assets [line items]    
Assets 15,439 11,301
Recurring fair value measurements | Assets attributable to non-controlling interest | Level 1    
Disclosure of fair value measurement of assets [line items]    
Assets 1,706 3,248
Recurring fair value measurements | Assets attributable to non-controlling interest | Level 2    
Disclosure of fair value measurement of assets [line items]    
Assets 13,733 8,053
Recurring fair value measurements | Assets attributable to non-controlling interest | Level 3    
Disclosure of fair value measurement of assets [line items]    
Assets $ 0 $ 0