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Note 2 - Significant Accounting Policies (Details Textual) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) shares | Sep. 30, 2022 USD ($)
Number of Operating Segments |  |  | 1 |
Government Assistance, Amount | $ | $ 0 | $ 400 | $ 0 | $ 900
Operating Lease, Weighted Average Remaining Lease Term (Year) | 7 months 6 days |  | 7 months 6 days |
Leases, Acquired-in-Place [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 6 months |  | 6 months |
Building [Member] |  |  |  |
Property, Plant and Equipment, Useful Life (Year) | 39 years |  | 39 years |
Building Improvements [Member] |  |  |  |
Property, Plant and Equipment, Useful Life (Year) | 10 years |  | 10 years |
Share-Based Payment Arrangement, Option [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  | 4 years |
Restricted Stock [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares |  |  | 57,143 |

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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