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Note 5 - Leases (Details Textual) |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 03, 2021 USD ($) ft² | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | May 07, 2024 ft² | Dec. 31, 2023 USD ($)
Operating Lease, Right-of-Use Asset |  | $ 631,000 |  | $ 631,000 |  |  | $ 57,000
Operating Lease, Liability |  | $ 1,857,000 |  | $ 1,857,000 |  |  |
RHODE ISLAND |  |  |  |  |  |  |
Number of Stand-Alone Facilities |  | 2 |  | 2 |  |  |
Minimum [Member] |  |  |  |  |  |  |
Lessee, Operating Lease, Discount Rate |  | 4.00% |  | 4.00% |  |  |
Lessee, Operating Lease, Remaining Lease Term (Year) |  | 5 years |  | 5 years |  |  |
Maximum [Member] |  |  |  |  |  |  |
Lessee, Operating Lease, Discount Rate |  | 8.00% |  | 8.00% |  |  |
Lessee, Operating Lease, Remaining Lease Term (Year) |  | 17 years |  | 17 years |  |  |
Related Party [Member] |  |  |  |  |  |  |
Sublease Income |  | $ 9,000 | $ 49,000 | $ 9,000 | $ 99,000 |  |
RI Companies [Member] |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  | 60.00% |
Number of Single-unit Facilities |  |  |  |  |  | 3 |
Sublease Office in San Francisco, California [Member] |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 3,253 |  |  |  |  |  |
Operating Lease, Monthly Expense | $ 22,011 |  |  |  |  |  |
Lessee, Operating Sublease, Monthly Income | $ 16,195 |  |  |  |  |  |
Lease Agreement for New Corporate Office [Member] |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 900 |  |  |  |  |  |
Operating Lease, Monthly Expense | $ 4,500 |  |  |  |  |  |
Woonsocket Operating Lease [Member] |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  |  |  |  | 1,950 |
Woonsocket Operating Lease [Member] | Related Party [Member] |  |  |  |  |  |  |
Accrued Rent |  | $ 50,000 |  | $ 50,000 |  |  |

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