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Note 2 - Summary of significant accounting policies: Accounts and notes receivable, net (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Details
Accounts and Financing Receivable, Allowance for Credit Loss	$ 534,562	$ 472,293	$ 303,311	$ 310,968
Provision For Credit Losses Of Accounts And Notes Receivable	$ 77,399	$ 178,118	$ 16,394

X

- Definition

Represents the monetary amount of Provision For Credit Losses Of Accounts And Notes Receivable, during the indicated time period.

+ References

No definition available.

+ Details

Name:	fil_ProvisionForCreditLossesOfAccountsAndNotesReceivable
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of allowance for credit loss of accounts and financing receivables. Includes, but is not limited to, notes and loan receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-4

+ Details

Name:	us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_TextBlockAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration