REVENUE RECOGNITION - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Total revenue	$ 45,729	$ 44,976	$ 134,912	$ 128,861
Deposits revenue
Disaggregation of Revenue [Line Items]
Total revenue	26,222	29,286	79,196	79,874
Deposits software and hardware | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Total revenue	17,529	21,793	53,326	58,335
Deposits services and other | Transferred over Time
Disaggregation of Revenue [Line Items]
Total revenue	8,693	7,493	25,870	21,539
Identity verification revenue
Disaggregation of Revenue [Line Items]
Total revenue	19,507	15,690	55,716	48,987
Identity verification software and hardware | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Total revenue	1,978	869	4,866	5,196
Identity verification services and other | Transferred over Time
Disaggregation of Revenue [Line Items]
Total revenue	$ 17,529	$ 14,821	$ 50,850	$ 43,791