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Commitments and Contingencies - Additional Information (Details) ft² in Thousands, € in Millions |  |  |  |  |  |  |  |  | 1 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 28, 2020 patent | Jan. 10, 2020 USD ($) patent | Nov. 06, 2019 USD ($) patent | Jul. 31, 2019 patent | Aug. 17, 2018 patent | Jul. 07, 2018 patent | Jun. 11, 2018 USD ($) | Jun. 11, 2018 EUR (€) | May 03, 2018 USD ($) | Jun. 12, 2020 petition | Jun. 30, 2020 USD ($) ft² patent | Oct. 01, 2019 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average remaining lease term of operating leases |  |  |  |  |  |  |  |  |  |  | 4 years 6 months |
Weighted average discount rate of operating leases |  |  |  |  |  |  |  |  |  |  | 4.70% |
Right-of-use assets |  |  |  |  |  |  |  |  |  |  | $ 5,683,000 | $ 6,800,000
Operating lease liabilities |  |  |  |  |  |  |  |  |  |  | 7,325,000 | $ 8,200,000
Lease liabilities, current portion |  |  |  |  |  |  |  |  |  |  | 1,651,000 |
Lease liabilities, non-current portion |  |  |  |  |  |  |  |  |  |  | 5,674,000 |
Operating lease costs |  |  |  |  |  |  |  |  |  |  | 600,000 |
Operating cash flows for operating leases paid |  |  |  |  |  |  |  |  |  |  | $ 1,300,000 |
Minimum |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Remaining operating lease term |  |  |  |  |  |  |  |  |  |  | 2 years |
Maximum |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Remaining operating lease term |  |  |  |  |  |  |  |  |  |  | 8 years |
Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  | $ 10,000,000.0 |  |  |
Interest rate floor |  |  |  |  |  |  |  |  | 4.50% |  |  |
Minimum unrestricted cash and unused borrowing capacity |  |  |  |  |  |  |  |  | $ 15,000,000.0 |  |  |
Adjusted quick ratio requirement |  |  |  |  |  |  |  |  | 1.75 |  |  |
Borrowings outstanding |  |  |  |  |  |  |  |  |  |  | $ 0 |
Line of Credit | Revolving Credit Facility | Prime Rate |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  |  | 0.25% |  |  |
Building |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Office space subject to the lease | ft² |  |  |  |  |  |  |  |  |  |  | 29 |
Pending Litigation | General and administrative |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Legal fees |  |  |  |  |  |  |  |  |  |  | $ 2,000,000.0 |
Pending Litigation | UrbanFT |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimate of future contingency liability accrual |  |  |  |  |  |  |  |  |  |  | 0 |
Number of patents allegedly infringed | patent | 2 |  |  | 5 |  |  |  |  |  |  |  |
Number of patents infringed | patent | 2 |  |  |  |  |  |  |  |  |  |  |
Number of invalid patents | patent | 2 |  |  |  |  |  |  |  |  |  |  |
Pending Litigation | Global Equity & Corporate Consulting, S.L. | ICAR |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Contingency amount claimed |  |  |  |  |  |  | $ 900,000 | € 0.8 |  |  |  |
Estimate of future contingency liability accrual |  |  |  |  |  |  |  |  |  |  | 0 |
Pending Litigation | USAA | Wells Fargo |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimate of future contingency liability accrual |  |  |  |  |  |  |  |  |  |  | $ 0 |
Number of patents allegedly infringed | patent |  | 2 |  |  | 5 | 4 |  |  |  |  | 3 |
Number of patents infringed | patent |  | 1 | 1 |  |  |  |  |  |  |  |  |
Amount awarded in damages to other party |  | $ 102,000,000 | $ 200,000,000 |  |  |  |  |  |  |  |  |
Number of patents dropped from litigation | patent |  |  |  |  | 2 |  |  |  |  |  |  |
Number of invalid patents | patent |  |  |  |  | 1 |  |  |  |  |  |  |
Number of petitions filed | petition |  |  |  |  |  |  |  |  |  | 4 |  |

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