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Revenue Recognition - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 45,703	$ 32,473
Deposits revenue
Disaggregation of Revenue [Line Items]
Total revenue	30,281	19,052
Identity verification revenue
Disaggregation of Revenue [Line Items]
Total revenue	15,422	13,421
Transferred at Point in Time | Deposits software and hardware
Disaggregation of Revenue [Line Items]
Total revenue	24,453	13,630
Transferred at Point in Time | Identity verification software and hardware
Disaggregation of Revenue [Line Items]
Total revenue	1,923	1,815
Transferred over Time | Deposits services and other
Disaggregation of Revenue [Line Items]
Total revenue	5,828	5,422
Transferred over Time | Identity verification services and other
Disaggregation of Revenue [Line Items]
Total revenue	$ 13,499	$ 11,606

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