Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Changes in Gross Unrecognized Tax Benefits (Details)

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INCOME TAXES - Changes in Gross Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Unrecognized Tax Benefits [Roll Forward]      
Balance, beginning of year $ 3,779 $ 4,123 $ 2,807
Increases for tax positions of prior years 378 100 1,393
Decreases for tax positions of prior years 0 0 (200)
Increases based on tax positions related to the current year 1,044 769 551
Decreases due to lapse of statute of limitation (695) (1,213) (428)
Balance, end of year $ 4,506 $ 3,779 $ 4,123