Note 3 - Accounts and notes receivable, net: Summary of accounts and notes receivable (Details) - USD ($) |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|---|---|
| Details | ||||
| Accounts receivable | $ 3,699,045 | $ 2,605,556 | ||
| Notes receivable | 331,955 | 322,908 | ||
| Allowance for credit losses | (548,827) | (534,562) | $ (472,293) | $ (303,311) |
| Total accounts and notes receivable, net | $ 3,482,173 | $ 2,393,902 |
| X | ||||||||||
- Definition Amount of allowance for credit loss of accounts and financing receivables. Includes, but is not limited to, notes and loan receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, of accounts and financing receivables, classified as current. Includes, but is not limited to, notes and loan receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amortized cost, before allowance for credit loss, of financing receivable classified as current. Excludes net investment in lease. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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