Note 1 - Description of Business and Significant Accounting Policies (Details Textual) |
6 Months Ended | ||
|---|---|---|---|
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Jun. 30, 2026
$ / shares
shares
|
Jun. 30, 2025
shares
|
Dec. 31, 2025
$ / shares
shares
|
|
| Number of Wholly-Owned Operating Subsidiaries | 4 | ||
| Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares | $ 0.1 | $ 0.1 | |
| Common Stock, Shares Authorized (in shares) | 20,000,000 | 20,000,000 | |
| Common Stock, Shares, Issued (in shares) | 7,788,922 | 7,788,922 | |
| Common Stock, Shares, Outstanding (in shares) | 7,788,922 | 7,788,922 | |
| Weighted Average Number of Shares Outstanding, Basic (in shares) | 7,788,922 | 7,748,922 | |
| Weighted Average Number of Shares Outstanding, Diluted | 7,788,922 | 7,748,922 | |
| Weighted Average Number of Shares Outstanding, Diluted, Adjustment | 0 | 0 | |
| X | ||||||||||
- Definition Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Represents the number of wholly-owned operating subsidiaries. No definition available.
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