Note 10 - Stock Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	Stock Incentives Granted				Stock Incentives Exercised				Stock Incentives Expired				Stock Incentives Cancelled
	2022		2021		2022		2021		2022		2021		2022		2021
2003 Incentive Stock Plan1 §		N/A		N/A		-		67,500		-		-		-		-
2015 Incentive Stock Plan2 §		-		-		-		-		-		-		-		-
Non-Employee Directors’ Stock Option Plan3 §		N/A		N/A		-		-		-		-		-		-
2011 Non-Employee Directors Stock Plan4 §		N/A		N/A		-		-		-		-		-		-
2020 Non-Employee Directors’ Stock Incentive Plan5 † §		8,808		4,443		N/A		N/A		N/A		N/A		N/A		N/A
2022 Employee Stock Incentive Plan6 † §		-		-		-		-		-		-		-		-

	Total of All Plans		Fully Vested and Exercisable		Not Vested
Options Granted		1,356,500		59,000		-
Options Exercised		1,014,820		N/A		N/A
Options Cancelled		282,680		N/A		N/A

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

	2022				2021
Options outstanding at January 1		59,000				126,500
Options cancelled		-				-
Options exercised		-				67,500
Options granted		-				-
Options outstanding at December 31		59,000				59,000
Options available for grant at December 31		932,369				881,177
Options exercisable at December 31		59,000				49,000
Exercise price ranges per share:
Granted		N/A				N/A
Exercised		N/A				$ 1.52	-	$1.72
Outstanding		$3.50	-	$39.11		$3.50	-	$39.11
Weighted average exercise price per share:
Granted		-				-
Exercised		-			$	1.59
Outstanding at December 31	$	17.35			$	17.35
Exercisable at December 31	$	17.35			$	16.81

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

Options Outstanding and Exercisable:
Range of Exercise Price			Number Outstanding		Wgt. Avg. Contractual Life Remaining (in years)		Wgt. Avg. Exercise Price		Aggregate Intrinsic Value
$3.50	-	$3.86		13,000		4.2	$	3.75	$	371,680
	$7.80			8,000		5.4	$	7.80	$	125,550
	$19.99			30,000		6.1	$	19.99	$	269,400
	$39.11			8,000		6.4	$	39.11	$	-
$3.50	-	$39.11		59,000		5.6	$	17.35		766,630