XML 57 R49.htm IDEA: XBRL DOCUMENT v3.25.3
Fair value measurements - Schedule of Measurement of Fair Value of Major Asset and Liability classed (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Assets:    
Investments in equity $ 71,284 $ 57,948
Investments in equity securities recorded at cost 3,500 3,500
Fair value, recurring    
Assets:    
Investments in equity 67,784 54,448
Total assets 67,784 54,448
Level 1 | Fair value, recurring    
Assets:    
Investments in equity 0 0
Total assets 0 0
Level 2 | Fair value, recurring    
Assets:    
Investments in equity 0 0
Total assets 0 0
Level 3 | Fair value, recurring    
Assets:    
Investments in equity 0 0
Total assets 0 0
Investments Measured at Net Asset Value | Fair value, recurring    
Assets:    
Investments in equity 67,784 54,448
Total assets $ 67,784 $ 54,448