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Note 2 - Summary of significant accounting policies: Other receivables and other current assets (Details) - USD ($) |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Details |  |  |  |  |  |  |
Allowance for Credit Loss, Receivable, Other, Current | $ 278,776 | $ 252,947 | $ 239,594 | $ 278,776 | $ 252,947 | $ 239,594 | $ 264,880
Other Receivable And Other Current Assets Credit Loss Expense Reversal | $ 38,690 | $ 20,247 | $ (5,268) | $ 38,690 | $ 20,247 | $ (5,268) |

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- Definition Represents the monetary amount of Other Receivable And Other Current Assets Credit Loss Expense Reversal, during the indicated time period. + References No definition available. + Details
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Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of allowance for credit loss on receivable, classified as other and current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(a)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_AllowanceForDoubtfulOtherReceivablesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_TextBlockAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration