Note 13 - Stock-based Compensation Plan (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Cost of revenues	$	15	$	7	$	26	$	7
Selling expense		7		6		14		9
Engineering and product development expense		18		16		37		26
General and administrative expense		511		425		846		681
	$	551	$	454	$	923	$	723

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

	2022			2021
Risk-free interest rate		2.05	%		1.03	%
Dividend yield		0.00	%		0.00	%
Expected common stock market price volatility factor		.55			.50
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, 2022 (59,195 exercisable)		408,869		9.07
Granted		202,540		8.45
Exercised		-		-
Canceled		-		-
Options outstanding, June 30, 2022 (174,871 exercisable)		611,409		8.86

Nonvested Restricted Stock Shares Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested shares outstanding, January 1, 2022		262,533			7.16
Granted		123,533			9.21
Vested		(51,710	)		8.93
Forfeited		-			-
Unvested shares outstanding, June 30, 2022		334,356			7.65