Note 10 - Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

				Weighted
				Average
				Exercise Price
	Shares			Per Option
Options outstanding, December 31, 2019		1,326,414		$	2.86
Granted to employees and directors		-			-
Exercised		(757,674	)		2.64
Canceled/expired/forfeited		-			-
Options outstanding, December 31, 2020		568,740			3.42
Granted to employees and directors		-			-
Exercised		(134,494	)		3.17
Canceled/expired/forfeited		(6,666	)		3.62
Options outstanding, December 31, 2021		427,580			3.50
Options exercisable, December 31, 2021		315,583			3.47

Share-based Payment Arrangement, Activity [Table Text Block]

			Options Outstanding								Options Exercisable
Range of Exercise Prices			Options		Weighted Average Exercise Price		Weighted Average Remaining Contract Life (in years)		Aggregate Intrinsic Value		Options		Weighted Average Exercise Price		Weighted Average Remaining Contract Life (in years)		Aggregate Intrinsic Value
$3.42	-	$3.90		427,580	$	3.50		1.91	$	1,056,000		315,583	$	3.47		1.77	$	790,000