XML 101 R82.htm IDEA: XBRL DOCUMENT v3.24.0.1
Intangible assets - Rollforward (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Reconciliation of Changes in Intangible assets [Roll Forward]    
Beginning balance $ 5,214 $ 20,788
Additions to intangible assets 154 550
Amortization expense (1,696) (3,107)
Impairment charges on intangible assets (2,266) (13,017)
Ending balance 1,406 5,214
Cost    
Reconciliation of Changes in Intangible assets [Roll Forward]    
Beginning balance 79,227 78,677
Additions to intangible assets 154 550
Amortization expense 0 0
Impairment charges on intangible assets 0 0
Ending balance 79,381 79,227
Accumulated amortization    
Reconciliation of Changes in Intangible assets [Roll Forward]    
Beginning balance (74,013) (57,889)
Additions to intangible assets 0 0
Amortization expense 1,696 3,107
Impairment charges on intangible assets (2,266) (13,017)
Ending balance $ (77,975) $ (74,013)