Note 11 - Stock-based Compensation Plan (Tables)

9 Months Ended

Sep. 30, 2024

Notes Tables

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

	Three Months Ended September 30,					Nine Months Ended September 30,
	2024		2023			2024		2023
Cost of revenues	$	39	$	28		$	107	$	76
Selling expense		12		9			37		30
Engineering and product development expense		9		(1	)		21		18
General and administrative expense		477		508			1,285		1,499
	$	537	$	544		$	1,450	$	1,623

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		(30,080	)		5.41
Canceled		(36,240	)		8.57
Options outstanding, September 30, 2024 (262,310 exercisable)		604,050			10.93

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		(94,666	)		9.72
Forfeited		(16,174	)		12.35
Unvested shares outstanding, September 30, 2024		217,782			12.14