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Note 11 - Related Party Transactions (Details Textual) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 12, 2022 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Prepaid Expense, Current |  | $ 1,212 |  |  | $ 1,212 |  | $ 4,248
Mr. McAfee [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Services (in shares) | 180,000 |  |  |  |  |  |
Accrued Liabilities, Current |  | 200 |  |  | 200 |  |
Various Board Members [Member] |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  | 100 |  | $ 100 | 200 | $ 200 |
Employment Agreements and Expense Reimbursements [Member] | Mr. McAfee [Member] |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction |  |  |  |  | 400 |  |
Prepayments [Member] | Mr. McAfee [Member] |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction |  |  |  |  | 200 |  |
Prepaid Expense, Current |  | $ 100 |  |  | 100 |  |
One-time Guarantee Fee [Member] | Mr. McAfee [Member] |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction | $ 2,000 |  | $ 400 |  |  |  |
Board Compensation Fees [Member] | Various Board Members [Member] |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction |  |  |  |  | $ 400 |  | $ 300

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 10 -Name Accounting Standards Codification -Section 05 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482955/340-10-05-5 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483032/340-10-45-1 + Details
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- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483326/850-10-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483326/850-10-50-3 + Details
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