Note 2 - Significant Accounting Policies (Details Textual) $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
|
Jan. 02, 2024
shares
|
Jan. 01, 2023
shares
|
Sep. 30, 2016
shares
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2022
USD ($)
|
|
| Number of Reportable Segments | 1 | ||||
| Number of Operating Segments | 1 | ||||
| Stock Issued During Period, Shares, New Issues (in shares) | 250,000 | ||||
| Preferred Stock, Dividend Rate, Percentage | 2.50% | ||||
| Common Stock Dividends, Shares (in shares) | 231,316 | ||||
| Research And Development Expense, Licenses Acquired | $ | $ 300 | $ 300 | |||
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | $ | $ 0 | $ 0 | |||
| Share-Based Payment Arrangement, Option [Member] | |||||
| Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | 4 years | ||||
| Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) | 10 years | ||||
| Subsequent Event [Member] | |||||
| Common Stock Dividends, Shares (in shares) | 1,685,767 | ||||
| Common Stock Dividends, Shares, Percentage Of Fully Diluted Outstanding Equity | 2.50% | ||||
| X | ||||||||||
- Definition Percentage of fully diluted outstanding equity for shares of common stock dividends. No definition available.
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| X | ||||||||||
- Definition Amount of research and development expenses attributable to licenses acquired. No definition available.
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| X | ||||||||||
- Definition Number of shares of common stock issued as dividends during the period. Excludes stock splits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The percentage rate used to calculate dividend payments on preferred stock. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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