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Note 9 - Geographic Information: Schedule Of Geographic Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Details |  |  |
Company Sales in the United States | $ 34,524 | $ 31,758 | $ 26,175
Company Sales in Europe | 7,214 | 7,434 | 6,399
Company Sales Other | $ 10,543 | $ 9,862 | $ 9,604

X
- Definition Represents the monetary amount of Company Sales in Europe, during the indicated time period. + References No definition available. + Details
Name: | fil_CompanySalesInEurope
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the monetary amount of Company Sales in the United States, during the indicated time period. + References No definition available. + Details
Name: | fil_CompanySalesInTheUnitedStates
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the monetary amount of Company Sales Other, during the indicated time period. + References No definition available. + Details
Name: | fil_CompanySalesOther
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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