Note 8 - Options: Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range (Details) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value \| $	$ 0	$ 77	$ 31
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value \| $	$ 0	$ 0	$ 814
Range 1
Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit	$ 58.1
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit	$ 64.09
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding \| shares	53,375
Weighted Average Remaining Contractual Life (Years)	8.54
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price	$ 60.9
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable \| shares	11,125
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 61.59
Range 2
Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit	74.64
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit	$ 77.07
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding \| shares	47,810
Weighted Average Remaining Contractual Life (Years)	5.36
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price	$ 76.6
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable \| shares	38,660
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 76.48
Range 3
Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit	82.6
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit	$ 82.6
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding \| shares	19,900
Weighted Average Remaining Contractual Life (Years)	6.78
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price	$ 82.6
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable \| shares	14,925
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 82.6
Range 4
Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit	58.1
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit	$ 82.6
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding \| shares	121,085
Weighted Average Remaining Contractual Life (Years)	6.99
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price	$ 70.66
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable \| shares	64,710
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 75.33

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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