Note 10 - Stock-based Compensation Plan (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

	Three Months Ended March 31,
	2023		2022
Cost of revenue	$	19	$	11
Selling expense		10		7
Engineering and product development expense		10		19
General and administrative expense		435		335
	$	474	$	372

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

	2023			2022
Risk-free interest rate		3.94	%		1.81	%
Dividend yield		0.00	%		0.00	%
Expected common stock market price volatility factor		.57			.54
Weighted average expected life of stock options (years)		6.25			6.25

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

	Number of Shares			Weighted Average Exercise Price
Options outstanding, January 1, 2023 (167,886 exercisable)		580,419		$	8.91
Granted		90,392			16.06
Exercised		(25,200	)		6.55
Canceled		(23,859	)		9.09
Options outstanding, March 31, 2023 (185,246 exercisable)		621,752			10.04

Nonvested Restricted Stock Shares Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested shares outstanding, January 1, 2023		288,450		$	7.80
Granted		90,588			16.06
Vested		(21,066	)		12.21
Forfeited		(13,271	)		9.88
Unvested shares outstanding, March 31, 2023		344,701			9.71