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Note 6 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]

		Year ended December 31,
		2022				2021
Stock options		$	761			$	618
Restricted stock			15				53
Total		$	776			$	671

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

		Year ended December 31,
		2022				2021
Risk-free interest rate			4.2	%			1.0	%
Volatility factor			50	%			50	%
Weighted average expected life (years)			4.8				4.8
Forfeiture rate			10.0	%			10.0	%
Dividends			0.0	%			0.0	%

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

Year ended December 31, 2022
		Number of shares				Weighted average exercise price per share				Weighted average remaining contractual term				Aggregate intrinsic value
Shares under option – January 1			1,306,824			$	6.87
Options granted			289,950				5.42
Options exercised			(59,500	)			3.82
Options forfeited or expired			(111,581	)			6.56
Shares under option – December 31			1,425,693			$	6.72				4.15				-
Vested and expected to vest - December 31			1,300,732			$	6.78				3.97				-
Options exercisable – December 31			881,804			$	7.13				2.96				-

Year ended December 31, 2021
		Number of shares				Weighted average exercise price per share
Shares under option – January 1			1,217,163			$	6.50
Options granted			340,500				6.78
Options exercised			(204,429	)			4.39
Options forfeited or expired			(46,410	)			7.44
Shares under option – December 31			1,306,824			$	6.87
Options exercisable – December 31			745,288			$	6.85

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

					Option outstanding												Options exercisable
Range of exercise prices					Number of outstanding options				Weighted- average remaining contractual life				Weighted- average exercise price				Number of options exercisable				Weighted- average exercise price
$4.29	-	$5.45				516,949				4.65			$	5.10				197,001			$	4.64
$5.71	-	$6.51				302,244				3.53				6.29				224,937				6.22
$6.69	-	$6.97				177,667				5.76				6.96				65,362				6.96
$8.25	-	$9.96				428,833				3.34				8.88				394,504				8.92
$4.29	-	$9.96				1,425,693				4.16			$	6.72				881,804			$	7.13

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