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Share-based compensation (Tables)
 12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of share-based payment arrangement expense
Share-based compensation consisted of the following for the years ended December 31, 2025 and 2024:
Years Ended
December 31, 2025December 31, 2024
Equity-classified awards:
Stock options$8,268 $9,374 
Performance stock units10,660 1,705 
Restricted stock units11,779 14,617 
Share-based compensation expense: equity-classified awards30,707 25,696 
Liability-classified awards:
Virtual share option awards(1)
5,029 — 
Share-based compensation expense: liability-settled awards5,029 — 
Total share-based compensation expense$35,736 $25,696 
(1) Includes the cumulative share-based compensation expense recognized for VSOs granted during the second quarter of 2025, for which the requisite service periods retroactively commenced in January 2023.
Schedule of stock option activity
The total intrinsic value of stock options exercised and the total fair value of stock options vested during the years ended December 31, 2025 and 2024 were as follows:
Years Ended
December 31, 2025December 31, 2024
Total intrinsic value of options exercised$4,807 $208 
Total fair value of shares vested5,256 8,353 
The Company’s stock options activity and related information during the years ended December 31, 2025 and 2024 were as follows:
Number of
options		Weighted
average
exercise price		Weighted average remaining contractual life
(years) 		Aggregate intrinsic value
Outstanding at January 1, 202529,661,070$4.982 
Forfeited(6,852,414)7.311 
Expired(1)
(2,213,794)8.959 
Exercised(1,864,272)0.137 
Granted13,125,2151.093 
Outstanding at December 31, 202531,855,805$2.886 6.65$28,364 
Options exercisable at December 31, 202510,122,969$3.532 3.05$10,928 
(1) Includes adjustments for changes in estimates.
Number of
options		Weighted
average
exercise price		Weighted average remaining contractual life
(years)		Aggregate intrinsic value
Outstanding at January 1, 202427,932,603$5.290 
Forfeited(1,461,492)4.514 
Expired(1)
(430,377)14.740 
Exercised(75,391)2.060 
Granted3,695,727 3.532 
Outstanding at December 31, 202429,661,070$4.982 5.50$8,846 
Options exercisable at December 31, 202416,718,254$5.540 3.40$8,778 
(1) Includes adjustments for changes in estimates.
Schedule of fair value assumptions
Significant assumptions used to estimate the fair value of the Company’s stock options granted during the years ended December 31, 2025 and 2024 were as follows:
Years Ended
December 31, 2025December 31, 2024
Expected volatility
72% — 79%
 71% — 74%
Expected life in years
6.16 - 6.24
6.01 - 6.02
Expected dividends(1)
— %— %
Risk-free interest rate (based on government bonds)
3.81% — 4.21%
3.63% — 4.52%
(1) The Company has never paid cash dividends nor expects to pay cash dividends in the foreseeable future.
Schedule of restricted stock units activity
The Company’s PSU activity and related information for the years ended December 31, 2025 and 2024 were as follows:
Number of PSUsWeighted-Average Grant Date Fair Value
Unvested at January 1, 20251,889,582$3.81 
Forfeited(1,750,337)2.81 
Vested(359,948)3.45 
Granted10,011,1390.94 
Unvested at December 31, 20259,790,436$1.06 
Inception-to-date PSUs vested at December 31, 2025756,485$3.16 
Number of PSUsWeighted-Average Grant Date Fair Value
Unvested at January 1, 20242,024,121$2.89 
Forfeited(2,141,826)3.37
Vested(396,537)2.89
Granted2,403,8244.04
Unvested at December 31, 20241,889,582$3.81 
Inception-to-date PSUs vested at December 31, 2024396,537$2.89 
The Company’s RSU activity and related information for the years ended December 31, 2025 and 2024 were as follows:
Number of RSUsWeighted-Average Grant Date Fair Value
Unvested at January 1, 20256,333,784$3.63 
Forfeited(2,394,476)2.09 
Vested(2,618,222)3.88 
Granted25,224,9141.39 
Unvested at December 31, 202526,546,000$1.61 
Inception-to-date RSUs vested at December 31, 202511,679,617$5.92 
Number of RSUsWeighted-Average Grant Date Fair Value
Unvested at January 1, 20246,145,959$4.12 
Forfeited(2,459,478)4.06 
Vested(3,228,557)4.33 
Granted 5,875,8603.68 
Unvested at December 31, 20246,333,784$3.63 
Inception-to-date RSUs vested at December 31, 20249,061,395$6.51