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Note 15 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Share-based Payment Arrangement, Option, Activity [Table Text Block]

		Number of Shares				Weighted-Average Exercise Price				Weighted-Average of Remaining Contractual Life (in years)				Aggregate Intrinsic Value
Outstanding at December 31, 2020			2,423,466			$	4.41
Issued			133,850			$	37.37
Exercised			(526,015	)		$	3.58
Expired/Forfeited			(13,332	)		$	15.30
Outstanding at December 31, 2021			2,017,969			$	6.74				1.2			$	130,311,334
Exercisable at December 31, 2021			1,599,199			$	3.82				0.7			$	107,945,775

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block]

		Year ended December 31,
			2021				2020
Weighted average fair value per share of options granted		$	24.00			$	9.47
Cash received from options exercised, net		$	1,885			$	1,326
Aggregate intrinsic value of options exercised		$	13,673			$	5,726
Grant date fair value of shares vested		$	834			$	944

X

- Definition

Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year.

+ References

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- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

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