REVENUE RECOGNITION - Schedule of Contract Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 31,936	$ 36,811	$ 32,348	$ 31,682
Contract assets, current	11,697	12,687	15,588	15,818
Contract assets, non-current	1,936	1,405	3,897	3,620
Contract liabilities (deferred revenue), current	25,206	29,061	21,694	21,231
Contract liabilities (deferred revenue), non-current	$ 742	$ 1,085	$ 692	$ 753