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v3.23.1

Commitments (Narrative) (Details) | 3 Months Ended
--- | ---
Mar. 31, 2023 USD ($) ft² | Mar. 31, 2022 USD ($)
Operating Leased Assets [Line Items] |  |
Cash paid for operating lease liabilities | $ 24,000 | $ 41,000
Buildings [Member] |  |
Operating Leased Assets [Line Items] |  |
Rent expense | $ 24,000 | $ 41,000
Austin, Texas [Member] | Operating Leases [Member] |  |
Operating Leased Assets [Line Items] |  |
Office space | ft² | 6,000 |
Lease expiration date | Apr. 30, 2024 |

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