Note 11 - Stock-based Compensation - Stock-Based Payment Awards (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
Jun. 30, 2024
Outstanding and exerciseable, shares (in shares)	924,067
Outstanding and exerciseable, weighted average exercise price (in dollars per share)	$ 3.37
Exercised, shares (in shares)	(7,848)
Exercised, weighted average exercise price (in dollars per share)	$ 3.58
Cancelled/Forfeited, shares (in shares)	(19,266)
Cancelled/Forfeited, weighted average exercise price (in dollars per share)	$ 4.46
Outstanding and exerciseable, shares (in shares)	896,953
Outstanding and exerciseable, weighted average exercise price (in dollars per share)	$ 3.35
Outstanding and exerciseable, contractual term (Year)	3 years
Outstanding and exerciseable, aggregated intrinsic value	$ 91

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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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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- Definition

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

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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- Definition

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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