v3.26.1
13. STOCK-BASED COMPENSATION - Performance Stock Units - Summary of Performance Stock Units (Details)
$ / shares in Units, $ in Thousands
 9 Months Ended
Jun. 30, 2026
USD ($)
$ / shares
shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Number of Option Shares, Beginning Balance 1,604,559
Number of Option Shares, Ending Balance 1,604,559
Number of Shares, Less: Not expected to vest 1,648,476
Expected (Shares) 1,604,559
Weighted Average Exercise Price, Beginning Balance | $ / shares $ 156.3 [1]
Weighted Average Exercise Price, Granted | $ / shares 0 [1]
Weighted Average Exercise Price, Ending Balance | $ / shares $ 156.3 [1]
General PSUs  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Number of Option Shares, Beginning Balance 38,460
Number of Shares, Granted 0
Number of Shares, Vested (38,460)
Number of Shares, Forfeited 0
Number of Option Shares, Ending Balance 0
Number of Shares, Less: Not expected to vest 0
Expected (Shares) 0
Performance Stock  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Number of Option Shares, Beginning Balance 38,460
Number of Shares, Granted 10,978,591
Number of Shares, Vested (38,460)
Number of Shares, Forfeited 50,700
Number of Option Shares, Ending Balance 11,029,291
Number of Shares, Less: Not expected to vest 3,849,000
Expected (Shares) 7,180,291
Weighted Average Exercise Price, Beginning Balance | $ / shares $ 10.61
Weighted Average Exercise Price, Granted | $ / shares 7.95
Weighted Average Exercise, Vested | $ / shares 10.61
Weighted Average Exercise, Forfeited | $ / shares 7.6
Weighted Average Exercise Price, Ending Balance | $ / shares 7.95
Weighted Average Exercise Price, Less: Not expected to vest | $ / shares 9.4
Expected (in usd per share) | $ / shares $ 7.17
Aggregate Intrinsic Value Outstanding at Beginning | $ $ 558
Aggregate Intrinsic Value Outstanding at Ending | $ 160,476
Aggregate Intrinsic Value, Expected | $ $ 104,473
Performance Stock | LTIP PSUs  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Number of Option Shares, Beginning Balance 0
Number of Shares, Granted 3,280,591
Number of Shares, Vested 0
Number of Shares, Forfeited 50,700
Number of Option Shares, Ending Balance 3,331,291
Number of Shares, Less: Not expected to vest 0
Expected (Shares) 3,331,291
Performance Stock | STPA PSUs  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Number of Option Shares, Beginning Balance 0
Number of Shares, Granted 7,698,000
Number of Shares, Vested 0
Number of Shares, Forfeited 0
Number of Option Shares, Ending Balance 7,698,000
Number of Shares, Less: Not expected to vest 3,849,000
Expected (Shares) 3,849,000
[1] Weighted average calculated weighting the exercise price versus the number of common shares that would be granted on exercise.