Note 13 - Share-based Compensation - Summary of Stock Option Activity (Details) - Employee and Nonemployee Stock Option [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2023
Outstanding December 31, 2021 (in shares)	92,075
Outstanding December 31, 2021 (in dollars per share)	$ 39.98
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross	12,153
Granted (in dollars per share)	$ 131.13
Exercised (in shares)	(25,740)
Exercised (in dollars per share)	$ 30.67
Outstanding December 31, 2022 (in shares)	78,488
Outstanding December 31, 2022 (in dollars per share)	$ 57.14
Outstanding December 31, 2022 (Year)	5 years 6 months 21 days
Outstanding December 31, 2022	$ 9,018
Exercisable at December 31, 2022 (in shares)	66,335
Exercisable at December 31, 2022 (in dollars per share)	$ 43.59
Exercisable at December 31, 2022 (Year)	5 years 5 months 23 days
Exercisable at December 31, 2022	$ 8,521
Vested and expected to vest at December 31, 2022 (in shares)	78,488
Vested and expected to vest at December 31, 2022 (in dollars per share)	$ 57.14
Vested and expected to vest at December 31, 2022 (Year)	5 years 6 months 21 days
Vested and expected to vest at December 31, 2022	$ 9,018

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Gross number of share options (or share units) granted during the period.

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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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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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