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STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION - Narrative (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
shares
Sep. 30, 2025
USD ($)
plan
$ / shares
shares
Sep. 30, 2024
USD ($)
Mar. 31, 2025
shares
Mar. 31, 2024
shares
Share-based compensation          
Total shares reserved for issuance since inception of the stock option and equity compensation plans (in shares) | shares   51,400,000   48,900,000  
Number of available shares (in shares) | shares 2,500,000        
Future expense for performance stock option units   $ 127,186      
Share-Based Payment Arrangement, Nonemployee          
Share-based compensation          
Stock grants to non-employee directors (in shares) | shares   20,938      
Habu          
Share-based compensation          
Non-cash stock-based compensation expense   $ 8,100      
Business combination, contingent consideration, liability   3,300      
Business combination, contingent consideration, liability, expected costs   $ 4,900      
Restricted stock units          
Share-based compensation          
Number of performance plans | plan   3      
Restricted stock units | Time Based Vesting          
Share-based compensation          
Granted (in shares) | shares   1,971,321      
Aggregate fair value of restricted stock units granted   $ 58,200      
Vested in period, fair value   $ 41,400      
Restricted stock units | Time-Based Vesting Over Three Years          
Share-based compensation          
Vesting period   3 years      
Restricted stock units | Performance stock          
Share-based compensation          
Granted (in shares) | shares   485,579   111,652 158,486
Aggregate fair value of restricted stock units granted   $ 16,100      
The total fair value of performance-based restricted stock units   11,100      
Restricted stock units | Performance-Based Restricted Stock Units Under The Total Shareholder Return Performance Plan          
Share-based compensation          
Granted (in shares) | shares         369,807
Restricted stock units | Performance Shares Vesting Total Shareholder Return | Minimum          
Share-based compensation          
Award vesting rights percentage       0.00% 0.00%
Restricted stock units | Performance Shares Vesting Total Shareholder Return | Maximum          
Share-based compensation          
Award vesting rights percentage       200.00% 200.00%
Restricted stock units | Habu          
Share-based compensation          
Share-based compensation expense   $ 31 $ 429    
Employee stock purchase plan          
Share-based compensation          
Stock issued during period, ESPP (in shares) | shares   98,684      
Shares issued, price per share (in dollars per share) | $ / shares   $ 26.86      
Stock issued during period, ESPP, value   $ 2,700      
Share-based compensation expense   748 $ 871    
Future expense for performance stock option units   $ 200      
Stock Option and Equity Compensation Plans          
Share-based compensation          
Total shares reserved for issuance since inception of the stock option and equity compensation plans (in shares) | shares   54,000,000.0   51,500,000  
Shares which remained available for future grants (in shares) | shares   7,300,000      
Performance-Based Restricted Stock Units Under The Total Shareholder Return Performance Plan | Restricted stock units | Performance stock          
Share-based compensation          
Granted (in shares) | shares   143,725      
Aggregate fair value of restricted stock units granted   $ 6,000      
Performance-Based Restricted Stock Units Under The Total Shareholder Return Performance Plan | Restricted stock units | Performance stock | Minimum          
Share-based compensation          
Award vesting rights percentage   0.00%      
Performance-Based Restricted Stock Units Under The Total Shareholder Return Performance Plan | Restricted stock units | Performance stock | Maximum          
Share-based compensation          
Award vesting rights percentage   200.00%      
Operating Metrics Performance Plan | Restricted stock units | Performance stock          
Share-based compensation          
Granted (in shares) | shares   335,363      
Aggregate fair value of restricted stock units granted   $ 9,900      
Operating Metrics Performance Plan | Restricted stock units | Performance stock | Minimum          
Share-based compensation          
Award vesting rights percentage   0.00%      
Operating Metrics Performance Plan | Restricted stock units | Performance stock | Maximum          
Share-based compensation          
Award vesting rights percentage   200.00%      
Operating Metrics Performance Plan | Restricted stock units | Performance-Based Restricted Stock Units Under The Total Shareholder Return Performance Plan          
Share-based compensation          
Granted (in shares) | shares       260,532  
Operating Metrics Performance Plan | Restricted stock units | Performance Shares Vesting Total Shareholder Return | Minimum          
Share-based compensation          
Award vesting rights percentage       0.00% 0.00%
Operating Metrics Performance Plan | Restricted stock units | Performance Shares Vesting Total Shareholder Return | Maximum          
Share-based compensation          
Award vesting rights percentage       200.00% 200.00%
International Operating Metrics Performance Plan | Restricted stock units | Performance stock          
Share-based compensation          
Granted (in shares) | shares   6,491   35,658  
Aggregate fair value of restricted stock units granted   $ 200      
International Operating Metrics Performance Plan | Restricted stock units | Performance stock | Minimum          
Share-based compensation          
Award vesting rights percentage   100.00%      
International Operating Metrics Performance Plan | Restricted stock units | Performance stock | Maximum          
Share-based compensation          
Award vesting rights percentage   0.00%      
International Operating Metrics Performance Plan | Restricted stock units | Performance Shares Vesting Total Shareholder Return | Minimum          
Share-based compensation          
Award vesting rights percentage       0.00%  
International Operating Metrics Performance Plan | Restricted stock units | Performance Shares Vesting Total Shareholder Return | Maximum          
Share-based compensation          
Award vesting rights percentage       100.00%