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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2022
Jun. 30, 2022
Sep. 30, 2020
Dec. 31, 2022
Dec. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Sep. 30, 2022
Share-based compensation                
Total shares reserved for issuance since inception of the stock option and equity compensation plans (in shares)   37,900,000           42,400,000
Number of available shares (in shares)   4,500,000            
Vesting period       1 year        
Award vesting rights percentage       50.00%        
Award vesting percentage after one year       50.00%        
Performance Based Stock Units                
Share-based compensation                
Granted (in shares)       406,501        
Aggregate fair value of restricted stock units granted       $ 10,000        
Acuity Data                
Share-based compensation                
Non-cash stock-based compensation expense       4,800        
Business combination, contingent consideration, liability, expected costs $ 1,700     1,700        
Acuity Data | Accrued Liabilities                
Share-based compensation                
Business combination, contingent consideration, liability $ 1,400     1,400        
Restricted Stock | Diablo.AI, Inc.                
Share-based compensation                
Vested in period, fair value       $ 200        
Outstanding at the end of the period (in shares) 16,646     16,646   24,766    
Restricted stock units                
Share-based compensation                
Share-based compensation expense       $ 70,612 $ 37,810      
Restricted stock units | Vesting in four years                
Share-based compensation                
Granted (in shares)       4,277,207        
Aggregate fair value of restricted stock units granted       $ 105,500        
Vesting period       3 years        
Restricted stock units | Time Based Vesting                
Share-based compensation                
Vested in period, fair value       $ 29,900        
Granted (in shares)       4,277,207        
Forfeited in period (in shares)       1,237,106        
Outstanding at the end of the period (in shares) 5,929,731     5,929,731   4,176,682    
Restricted stock units | Performance Based Stock Units                
Share-based compensation                
Granted (in shares)       121,951        
Aggregate fair value of restricted stock units granted       $ 3,700        
Restricted stock units | ATS Performance Plan Vesting Total Shareholder Return                
Share-based compensation                
Granted (in shares)           36,425    
Restricted stock units | ATS Performance Plan Vesting Total Shareholder Return | Minimum                
Share-based compensation                
Award vesting rights percentage           0.00%    
Restricted stock units | ATS Performance Plan Vesting Total Shareholder Return | Maximum                
Share-based compensation                
Award vesting rights percentage           100.00%    
Restricted stock units | Performance Shares Vesting Total Shareholder Return                
Share-based compensation                
Granted (in shares)           49,977    
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 | Performance stock                
Share-based compensation                
Granted (in shares)       406,501     59,634  
Forfeited in period (in shares)       146,709        
Outstanding at the end of the period (in shares) 709,589     709,589   584,468    
The total fair value of performance-based restricted stock units       $ 3,000        
Restricted stock units | Contingent Equity Awards                
Share-based compensation                
Granted (in shares)   338,101            
Restricted stock units | Performance Based Stock Units Under Operating Metrics                
Share-based compensation                
Granted (in shares)       284,550        
Aggregate fair value of restricted stock units granted       $ 6,300        
Restricted stock units | Performance Based Stock Units Under Operating Metrics | Minimum                
Share-based compensation                
Award vesting rights percentage       0.00%        
Restricted stock units | Performance Based Stock Units Under Operating Metrics | Maximum                
Share-based compensation                
Award vesting rights percentage       200.00%        
Restricted stock units | 2021 Performance Shares That Will Vest Immediately                
Share-based compensation                
Forfeited in period (in shares)       71,666        
Outstanding at the end of the period (in shares) 208,746     208,746        
Hurdle achievement, percentage       50.00%        
Restricted stock units | 2021 Performance Shares That Will Vest In One Year                
Share-based compensation                
Vesting period       1 year        
Restricted stock units | Diablo.AI, Inc.                
Share-based compensation                
Share-based compensation expense       $ 0 660      
Performance stock | Contingent Equity Awards                
Share-based compensation                
Granted (in shares)   284,550            
Employee stock purchase plan                
Share-based compensation                
Share-based compensation expense       1,527 $ 1,282      
Stock issued during period, ESPP, value       $ 4,000        
Stock issued during period, ESPP (in shares)       197,255        
Shares issued, price per share (in dollars per share) $ 20.38     $ 20.38        
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)   39,100,000           43,600,000
Shares which remained available for future grants (in shares) 4,100,000     4,100,000        
2005 Plan                
Share-based compensation                
Share-based compensation expense $ 7,000              
Operating Metrics Performance Plan | Restricted stock units                
Share-based compensation                
Vesting period       1 year        
Award vesting rights percentage       50.00%        
Forfeited in period (in shares)       58,312        
Outstanding at the end of the period (in shares) 174,930     174,930        
Operating Metrics Performance Plan Units That Will Vest Immediately | Restricted stock units                
Share-based compensation                
Award vesting rights percentage       50.00%        
Operating Metrics Performance Plan Units That Will Vest In One Year | Restricted stock units                
Share-based compensation                
Award vesting rights percentage       50.00%        
2021 Performance Shares That Will Vest Immediately | Restricted stock units                
Share-based compensation                
Award vesting rights percentage       50.00%        
2021 Performance Shares That Will Vest In One Year | Restricted stock units                
Share-based compensation                
Award vesting rights percentage       50.00%        
2019 Operating Metrics Performance Plan | Restricted stock units                
Share-based compensation                
Award vesting rights percentage     96.00%          
Forfeited in period (in shares)     243,378