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Commitments and Contingencies - Narrative (Details) ft² in Thousands, $ in Thousands, € in Millions |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 2 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 15, 2022 USD ($) | Dec. 13, 2021 USD ($) | Aug. 27, 2021 petition | Jul. 21, 2021 petition | Mar. 31, 2021 patent | Dec. 04, 2020 patent | Nov. 17, 2020 petition | Sep. 30, 2020 patent | Jan. 10, 2020 USD ($) product patent | Nov. 06, 2019 USD ($) patent | Jul. 31, 2019 patent | Aug. 17, 2018 patent | Jul. 07, 2018 patent | Jul. 07, 2018 petition | Jun. 11, 2018 USD ($) | Jun. 11, 2018 EUR (€) | Mar. 31, 2021 petition | Sep. 30, 2020 petition patent | Nov. 30, 2021 patent petition | Mar. 31, 2022 USD ($) ft² | Mar. 31, 2021 USD ($) | Feb. 23, 2021 petition | Mar. 31, 2022 USD ($) ft² | Mar. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Jun. 19, 2020 USD ($)
Leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average remaining lease term of operating leases (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years 2 months 12 days |  |  | 5 years 2 months 12 days |  |  |
Weighted average discount rate of operating leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.20% |  |  | 3.20% |  |  |
ROU assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,098 |  |  | $ 6,098 |  | $ 7,056 |
ROU liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,429 |  |  | 7,429 |  | 8,500 |
Lease liabilities, current portion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,944 |  |  | 1,944 |  | 1,943 |
Lease liabilities, non-current portion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,485 |  |  | 5,485 |  | $ 6,588 |
Operating lease costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500 | $ 500 |  | 1,100 | $ 1,100 |  |
Operating cash flows for operating leases paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |  |  |
Maplebear, Inc., d/b/a Instacart | Subscription to Mobile Verify Advance Service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual commitment amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,200
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining operating lease term (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  | 1 year |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining operating lease term (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8 years |  |  | 8 years |  |  |
Building |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Office space subject to the lease (in square feet) | ft² |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29 |  |  | 29 |  |  |
Pending Litigation | General and administrative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 700 |  |  |
Pending Litigation | UrbanFT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of patents allegedly infringed | patent |  |  |  |  |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of patents infringed | patent |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of invalid patents | patent |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of patents not infringed | patent |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pending Litigation | Global Equity & Corporate Consulting, S.L. | HooYu |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingency amount claimed |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 900 | € 0.8 |  |  |  |  |  |  |  |  |  |
Pending Litigation | USAA | Wells Fargo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of patents allegedly infringed |  |  |  |  |  |  |  |  | 2 | 3 |  | 5 | 4 | 4 |  |  |  | 2 |  |  |  |  |  |  |  |
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 invalid patents | patent |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of products accused of patent infringement | product |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of patents instituted | petition |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |
Number of patents denied institution petition | petition |  |  |  |  |  |  | 4 |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  | 4 |  |  |  |
Pending Litigation | USAA | PNC Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of patents allegedly infringed | patent |  |  |  |  | 2 | 2 |  | 2 |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Number of invalid patents | patent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |
Number of patents denied institution petition | petition |  |  | 2 | 6 |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  | 4 |  |  |  |  |  |  |
Pending Litigation | UrbanFT | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensatory damages awarded | $ 1,700 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pending Litigation | Maplebear, Inc., d/b/a Instacart |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingency amount claimed |  | $ 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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