Note 3 - Quarterly Results of Operations (Unaudited): Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Sep. 30, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2023 |
Sep. 30, 2023 |
Jun. 30, 2023 |
Mar. 31, 2023 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Details | |||||||||||||||
| Net Sales | $ 9,044 | $ 9,812 | $ 9,953 | $ 9,710 | $ 9,157 | $ 10,005 | $ 10,400 | $ 11,340 | $ 12,333 | $ 12,505 | $ 12,866 | $ 12,520 | $ 38,520 | $ 40,903 | $ 50,224 |
| Gross Profit | 5,264 | 5,604 | 5,595 | 5,538 | 5,323 | 5,802 | 6,253 | 6,766 | 7,098 | 7,359 | 7,739 | 7,843 | 22,001 | 24,143 | 30,038 |
| Net Income | $ 2,565 | $ 2,631 | $ 3,048 | $ 3,041 | $ 2,902 | $ 3,563 | $ 3,453 | $ 3,956 | $ 4,287 | $ 3,935 | $ 4,200 | $ 4,214 | $ 11,286 | $ 13,874 | $ 16,635 |
| Earnings per common share (diluted) | $ 0.8 | $ 0.82 | $ 0.94 | $ 0.92 | $ 0.86 | $ 1.03 | $ 0.98 | $ 1.09 | $ 1.18 | $ 1.08 | $ 1.15 | $ 1.16 | $ 3.48 | $ 3.96 | $ 4.57 |
| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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