Note 10 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	2021					2020
	Shares			Wtd. Avg. Exercise Price		Shares			Wtd. Avg. Exercise Price
Outstanding as of beginning of year		844,455		$	2.00		1,570,455		$	1.96
Exercised		(183,064	)		1.61		-			-
Forfeited		(1,146	)		5.69		(726,000	)		1.91
Expired		(35,714	)		1.73		-			-
Outstanding as of end of year		624,531		$	2.13		844,455		$	2.00
Stock options exercisable at year end		624,531		$	2.13		832,478		$	1.98

	2021					2020
	Shares			Wtd. Avg. Exercise Price		Shares			Wtd. Avg. Exercise Price
Outstanding as of beginning of year		686,001		$	1.64		737,497		$	1.64
Exercised		(686,001	)		1.64		(51,496	)		1.64
Outstanding as of end of year		-		$	-		686,001		$	1.64
Stock options exercisable as of year end		-		$	-		686,001		$	1.64

Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

Range of Exercise Prices			Number Outstanding as of December 31, 2021		Weighted Average Remaining Contractual Life		Weighted Average Exercise Price
$1.00	-	1.50		26,428		1.05	$	1.38
$1.51	-	2.00		290,760		3.27		1.87
$2.01	-	2.50		265,775		3.35		2.06
$2.51	-	8.60		41,568		3.75		4.86
				624,531		3.24	$	2.13

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

	2021					2020
	Shares			Wtd. Avg. Grant Date Fair Value		Shares			Wtd. Avg. Grant Date Fair Value
Outstanding as of beginning of year		930,854		$	19.31		429,399		$	13.25
Granted		801,484			47.20		717,267			20.88
Granted in lieu of cash		-			-		34,154			9.18
Vested		(378,502	)		19.31		(208,858	)		11.32
Forfeited		(141,053	)		36.95		(41,108	)		15.47
Non-vested as of year end		1,212,783		$	37.48		930,854		$	19.31

	2021				2020
	Shares		Wtd. Avg. Grant Date Fair Value		Shares			Wtd. Avg. Grant Date Fair Value
Outstanding as of beginning of year		-	$	-		-		$	-
Granted		-		-		82,805			9.18
Vested		-		-		(82,805	)		9.18
Non-vested as of year end		-	$	-		-		$	-

	2021					2020
	Shares			Wtd. Avg. Grant Date Fair Value		Shares			Wtd. Avg. Grant Date Fair Value
Outstanding as of beginning of year		224,774		$	19.20		123,851		$	26.99
Granted		152,665			32.50		109,140			10.95
Vested		(231,268	)		26.98		-			-
Forfeited		(6,415	)		40.65		(8,217	)		27.02
Non-vested as of year end		139,756		$	19.86		224,774		$	19.20

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

	2021		2020		2019
Research and development costs	$	1,906	$	1,012	$	571
Sales and marketing costs		1,788		852		711
General and administrative costs		8,061		3,518		1,584
Cost of revenue		2,201		599		177
Total	$	13,956	$	5,981	$	3,043