Note 11 - Stock-based Compensation Plan (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Cost of revenues	$	37	$	29	$	68	$	48
Selling expense		14		11		25		21
Engineering and product development expense		8		9		12		19
General and administrative expense		505		556		808		991
	$	564	$	605	$	913	$	1,079

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

	2024			2023
Risk-free interest rate		3.98	%		3.93	%
Dividend yield		0.00	%		0.00	%
Expected common stock market price volatility factor		.57			.57
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, 2024 (171,735 exercisable)		505,006		$	10.46
Granted		165,364			11.33
Exercised		(26,080	)		4.45
Canceled		(23,401	)		10.27
Options outstanding, June 30, 2024 (266,310 exercisable)		620,889			10.95

Nonvested Restricted Stock Shares Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested shares outstanding, January 1, 2024		189,784		$	11.51
Granted		138,838			11.38
Vested		(66,804	)		10.96
Forfeited		(11,200	)		12.29
Unvested shares outstanding, June 30, 2024		250,618			11.55