Note 8 - Stock-based Compensation (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	$	16
Research and development		20		4
Selling		11		5
General and administrative		85		72
Total	$	135	$	97

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

Stock price	$	14.11
Exercise price	$	14.11
Dividend yield		0	%
Expected volatility		72	%
Risk-free interest rate		3.39	%
Expected life (in years)		6.00

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

				Weighted
	Stock Option			Average
	Awards			Exercise
	(in shares)			Price
Outstanding at January 1, 2023		673,000		$	5.70
Granted		244,000			14.11
Exercised		(17,500	)		4.19
Outstanding at March 31, 2023		899,500		$	8.01

Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

Options Outstanding											Options Exercisable
					Weighted		Weighted						Weighted
					Average		Average						Average
Exercise			Number		Remaining		Exercise		Intrinsic		Number		Exercise		Intrinsic
Price Range			Outstanding		Contractual		Price		Value		Exercisable		Price		Value
$4.00	-	7.00		515,500		8.6	$	4.54	$	4,514,485		112,375	$	4.48	$	990,989
$7.01	-	10.00		20,000		5.1	$	8.07	$	104,600		20,000	$	8.07	$	104,600
$10.01	-	13.00		120,000		4.0	$	10.52	$	333,800		120,000	$	10.52	$	333,800
$13.01	-	16.00		244,000		10.0	$	14.11		-		-		-		-