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Commitments and Contingencies - Additional Information (Details) ft² in Thousands, € in Millions |  |  |  |  |  |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 10, 2020 USD ($) patent | Nov. 06, 2019 USD ($) patent | Aug. 17, 2018 patent | Jul. 07, 2018 patent | Jun. 11, 2018 USD ($) | Jun. 11, 2018 EUR (€) | May 03, 2018 USD ($) | Dec. 31, 2019 USD ($) ft² patent
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Weighted average remaining lease term of operating leases |  |  |  |  |  |  |  | 5 years
Weighted average discount rate of operating leases |  |  |  |  |  |  |  | 4.70%
Right-of-use assets |  |  |  |  |  |  |  | $ 6,535,000
Operating lease liabilities |  |  |  |  |  |  |  | 8,004,000
Lease liabilities, current portion |  |  |  |  |  |  |  | 1,291,000
Lease liabilities, non-current portion |  |  |  |  |  |  |  | 6,713,000
Operating lease costs |  |  |  |  |  |  |  | 600,000
Operating cash flows for operating leases paid |  |  |  |  |  |  |  | $ 400,000
Minimum |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Remaining lease term of operating leases |  |  |  |  |  |  |  | 2 years
Maximum |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Remaining lease term of operating leases |  |  |  |  |  |  |  | 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 |  |  |  |  |  |  |  | $ 500,000
Pending Litigation | Global Equity & Corporate Consulting, S.L. | ICAR |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Loss contingency, amount claimed |  |  |  |  | $ 900,000 | € 0.8 |  |
Pending Litigation | USAA | Wells Fargo |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of patents allegedly infringed | patent |  |  | 5 | 4 |  |  |  | 3
Number of patents infringed | patent |  | 1 |  |  |  |  |  |
Amount awarded in damages to other party |  | $ 200,000,000 |  |  |  |  |  |
Number of patents dropped from litigation | patent |  |  | 2 |  |  |  |  |
Number of invalid patents | patent |  |  | 1 |  |  |  |  |
Pending Litigation | USAA | Wells Fargo | Subsequent Event |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of patents allegedly infringed | patent | 2 |  |  |  |  |  |  |
Number of patents infringed | patent | 1 |  |  |  |  |  |  |
Amount awarded in damages to other party | $ 102,000,000 |  |  |  |  |  |  |

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