Note 10 - Common Stock and Stock-based Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

	Number of options (1)		Weighted average exercise price		Weighted average remaining contractual term		Aggregate intrinsic value
Outstanding as of December 31, 2022		106,000	$	20.24		2.0	$	609
Granted		—		—
Exercised		—		—
Forfeited or expired		—		—
Outstanding as of March 31, 2023		106,000	$	20.24		1.8	$	1,080
Exercisable as of March 31, 2023		106,000	$	20.24		1.8	$	1,080

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

	Number of RSUs and PSUs			Weighted Average Grant-Date Fair Value
Unvested as of December 31, 2022		879,277		$	37.57
Granted		389,560			23.56
Vested		(141,165	)		40.02
Forfeited or expired		(52,553	)		34.58
Unvested as of March 31, 2023 (unaudited)		1,075,119		$	32.32

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

	Three months ended March 31,
	2023 (unaudited)		2022 (unaudited)
Cost of revenue	$	404	$	339
Research and development, net		2,173		1,995
Sales and marketing		393		333
General and administrative		889		722
Total equity-based compensation expense	$	3,859	$	3,389

Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

	Three months ended March 31
	2023 (unaudited)			2022 (unaudited)
Expected dividend yield		0	%		0	%
Expected volatility		45	%		38	%
Risk-free interest rate		4.8	%		0.5	%
Contractual term of (months)		6			6