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Commitments and Contingencies - Narrative (Details) € in Thousands, $ in Thousands																	1 Months Ended			2 Months Ended	3 Months Ended	12 Months Ended
	Feb. 16, 2023 USD ($) patent	Sep. 02, 2022 EUR (€)	Jun. 02, 2022 USD ($)	Dec. 13, 2021 USD ($)	Jul. 21, 2021 patent	Mar. 31, 2021 patent	Dec. 18, 2020 patent	Dec. 04, 2020 patent	Sep. 30, 2020 patent	Jan. 10, 2020 USD ($) patent	Nov. 06, 2019 USD ($) patent day	Jul. 31, 2019 patent	Aug. 17, 2018 patent	Jul. 07, 2018 patent	Jun. 11, 2018 USD ($)	Jun. 11, 2018 EUR (€)	May 31, 2022 USD ($) patent	Mar. 31, 2021 patent	Sep. 30, 2020 patent	Jan. 26, 2021 patent	Feb. 23, 2021 patent	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 19, 2020 USD ($)
Employee 401(k) Plan
Company contribution, percent of designated deferral of eligible compensation																						50.00%
Company contribution, percent of employee compensation eligible for company match																						6.00%
Employer contribution related to 401(k) plan | $																						$ 700	$ 700	$ 400
Maplebear, Inc (dba Instacart) | Subscription To Mobile Verify Advance Service
Claims
Other commitment, annual amount committed | $																									$ 1,200
Pending Litigation | General and administrative
Claims
Legal fees incurred related to third-party claims against customers | $																						$ 1,400
Pending Litigation | UrbanFT, Inc.
Claims
Number of patents allegedly infringed | patent							2					5
Number of patents invalid | patent							2
Number of patents not infringed | patent							2
Global Equity & Corporate Consulting, S.L.- Breach of Services Agreement | ICAR Vision Systems, S.L. | Pending Litigation
Claims
Amount claimed during court proceedings															$ 800	€ 800
Settlement interest percentage		30.00%
Litigation settlement interest | €		€ 1,100
Claims against the escrow funds | €		900
Escrow deposit | €		200
Accrued interest | €		16,475,000
Litigation expense | €		€ 10,995,000
USAA | Pending Litigation | Wells Fargo
Claims
Number of patents allegedly infringed										2	3		5	4					2		4
Number of patents infringed | patent										1	1
Amount awarded in damages to other party | $										$ 102,000	$ 200,000
Number of patents dropped | patent													2
Number of patents invalid | patent													1
Number of patents instituted | patent																				3
Number of patents denied institution | patent																				1
USAA | Pending Litigation | PNC Bank
Claims
Number of patents allegedly infringed | patent						2		2	2								1		2
Amount awarded in damages to other party | $																	$ 218,000
Number of patents denied institution | patent					6													2
USAA | Settled Litigation | PNC Bank | Subsequent Event
Claims
Number of patents infringed | patent	1
Amount awarded in damages to other party | $	$ 4,300
UrbanFT, Inc. | Settled Litigation
Claims
Amount awarded to the Company | $			$ 2,300
UrbanFT, Inc. | Settled Litigation | Compensatory Damages
Claims
Amount awarded to the Company | $			1,700
UrbanFT, Inc. | Settled Litigation | Costs of Judgement Awarded
Claims
Amount awarded to the Company | $			2,600
UrbanFT, Inc. | Settled Litigation | Attorneys' Fees
Claims
Amount awarded to the Company | $			$ 600
Maplebear, Inc (dba Instacart) | Pending Litigation
Claims
Amount claimed during court proceedings | $				$ 2,000

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