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Note 3 - Accounts and notes receivable, net: Accounts and, financing receivable, allowance for credit loss (Details) - USD ($) | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Details |  |  |  |
Accounts and Financing Receivable, Allowance for Credit Loss | $ 534,562 | $ 472,293 | $ 303,311 | $ 310,968
Accounts And Financing Receivable Allowance For Credit Loss Addition | 77,399 | 178,118 | 16,394 |
Accounts And Financing Receivable Allowance For Credit Loss Foreign Currency Translation | $ (15,130) | $ (9,136) | $ (24,051) |

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- Definition Represents the monetary amount of Accounts And Financing Receivable Allowance For Credit Loss Foreign Currency Translation, as of the indicated date. + References No definition available. + Details
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- 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
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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