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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock Issued [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Non-controlling Interests [Member]
Beginning Balance at Sep. 30, 2022 $ 782,666 $ 29 $ 303,432 $ (2,806) $ 630,667 $ (148,656)  
Beginning Balance, Shares at Sep. 30, 2022   28,939,846          
Net (loss) income 109,478       109,282   $ 196
Non-controlling interests in subsidiaries from acquisitions 2,208           2,208
Shares issued pursuant to employee stock purchase plan 2,346   2,346        
Shares issued pursuant to employee stock purchase plan, Shares   92,900          
Shares issued upon vesting of equity awards, net of minimum tax withholding (4,224)   (4,224)        
Shares issued upon vesting of equity awards, net of minimum tax withholding, Shares   331,431          
Shares issued upon exercise of stock options, net of minimum tax withholding 7   7        
Shares issued upon exercise of stock options, net of minimum tax withholding, Shares   3,000          
Stock-based compensation 21,657   21,657        
Stock-based compensation, Shares   7,547          
Other comprehensive income (loss) 4,279     4,109     170
Ending Balance at Sep. 30, 2023 918,417 $ 29 323,218 1,303 739,949 (148,656) 2,574
Ending Balance, Shares at Sep. 30, 2023   29,374,724          
Net (loss) income 38,738       38,066   672
Purchase of treasury stock (2,141)         (2,141)  
Non-controlling interests in subsidiaries from acquisitions 6,784           6,784
Distributions to non-controlling interests (24)           (24)
Shares issued pursuant to employee stock purchase plan 2,513 $ 1 2,512        
Shares issued pursuant to employee stock purchase plan, Shares   96,929          
Shares issued upon vesting of equity awards, net of minimum tax withholding (5,908)   (5,908)        
Shares issued upon vesting of equity awards, net of minimum tax withholding, Shares   411,688          
Shares issued upon exercise of stock options, net of minimum tax withholding 128   128        
Shares issued upon exercise of stock options, net of minimum tax withholding, Shares   8,000          
Stock-based compensation 23,961   23,961        
Stock-based compensation, Shares   7,204          
Other comprehensive income (loss) 3,781     3,333     448
Ending Balance at Sep. 30, 2024 $ 986,249 $ 30 343,911 4,636 778,015 (150,797) 10,454
Ending Balance, Shares at Sep. 30, 2024 29,898,545 29,898,545          
Net (loss) income $ (30,766)       (31,631)   865
Purchase of treasury stock (27,480)         (27,480)  
Distributions to non-controlling interests (179)           (179)
Shares issued pursuant to employee stock purchase plan 2,482   2,482        
Shares issued pursuant to employee stock purchase plan, Shares   109,807          
Shares issued upon vesting of equity awards, net of minimum tax withholding (5,036) $ 1 (5,037)        
Shares issued upon vesting of equity awards, net of minimum tax withholding, Shares   523,848          
Shares issued upon exercise of stock options, net of minimum tax withholding 109   109        
Shares issued upon exercise of stock options, net of minimum tax withholding, Shares   5,750          
Stock-based compensation 19,353   19,353        
Stock-based compensation, Shares   5,844          
Other comprehensive income (loss) 4,021     3,598     423
Ending Balance at Sep. 30, 2025 $ 948,753 $ 31 $ 360,818 $ 8,234 $ 746,384 $ (178,277) $ 11,563
Ending Balance, Shares at Sep. 30, 2025 30,543,794 30,543,794