Note 14 - Share-based Compensation - Stock Option Activity (Details) - Share-Based Payment Arrangement, Option [Member] - $ / shares	6 Months Ended
Jun. 30, 2022
Outstanding (in shares)	624,531
Outstanding, weighted average exercise price (in dollars per share)	$ 2.13
Exercised (in shares)	(154,504)
Exercised, weighted average exercise price (in dollars per share)	$ 1.95
Outstanding as of June 30, 2022 (in shares)	470,027
Outstanding as of June 30, 2022 (in dollars per share)	$ 2.19
Stock options exercisable as of June 30, 2022 (in shares)	470,027
Options exercisable, weighted average exercise price (in dollars per share)	$ 2.19

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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