Note 4 - Accounts Receivable - Allowance for Doubtful Accounts (Details) - USD ($) |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Allowance for doubtful accounts | $ 137,969 | $ 637,556 |
| Bad debt expense | 32,627 | 29,439 |
| Receivables written off during the period | 0 | (608,331) |
| Effect of exchange rate changes | (4,358) | 79,305 |
| Allowance for doubtful accounts | $ 166,238 | $ 137,969 |
| X | ||||||||||
- Definition The effects of currency translation of accounts receivable charged against the allowance of doubtful accounts. No definition available.
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| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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