Note 8 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

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

	Three Months Ended March 31, 2022
	Shares			Wtd. Avg. Exercise Price
Outstanding as of beginning of year		624,531		$	2.13
Exercised		(129,933	)		1.98
Outstanding as of March 31, 2022		494,598		$	2.17
Stock options exercisable as of March 31, 2022		494,598		$	2.17

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

	Three Months Ended
	March 31, 2022
	Shares			Wtd. Avg. Grant Date Fair Value
Outstanding as of beginning of year		1,212,783		$	37.48
Granted		301,011			26.38
Vested		(165,366	)		37.48
Forfeited		(14,642	)		44.37
Non-vested as of March 31, 2022		1,333,786		$	34.90

	Three Months Ended March 31, 2022
	Shares			Wtd. Avg. Grant Date Fair Value
Outstanding as of beginning of year		139,756		$	19.86
Granted		349,568			22.66
Vested		(218,280	)		10.95
Non-vested as of March 31, 2022		271,044		$	30.64

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended March 31,
	2022		2021
Research and development costs	$	677	$	183
Sales and marketing costs		705		184
General and administrative costs		3,010		979
Cost of revenue		1,007		159
Total	$	5,399	$	1,505