Note 10 - Stock Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2021

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
	2021		2020		2021		2020		2021		2020		2021		2020
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 † §		4,443		4,380		N/A		N/A		N/A		N/A		N/A		N/A

	Total of All Plans		Fully Vested and Exercisable		Not Vested
Options Granted		1,356,500		49,000		10,000
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]

	2021				2020
Options outstanding at January 1			126,500				126,000
Options cancelled			-				-
Options exercised			67,500				-
Options granted			-				-
Options outstanding at December 31			59,000				126,500
Options available for grant at December 31			881,177				885,620
Options exercisable at December 31			49,000				102,500
Exercise price ranges per share:
Granted			N/A				N/A
Exercised		$ 1.52	-	$ 1.72			N/A
Outstanding		$ 3.50	-	$ 39.11		$ 1.52	-	$ 39.11
Weighted average exercise price per share:
Granted			-				-
Exercised	$		1.59				-
Outstanding at December 31	$		17.35		$		8.94
Exercisable at December 31	$		16.81		$		5.61

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

Options Outstanding:
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		6.0	$	3.75	$	528,960
$ 7.80				8,000		5.8	$	7.80	$	174,700
$ 19.99				30,000		6.4	$	19.99	$	564,300
$ 39.11				8,000		7.4	$	39.11	$	-
$ 3.50	-	$ 39.11		59,000		6.6	$	17.35	$	1,267,960

Options Exercisable:
Range of Exercise Price			Number Exercisable		Wgt. Avg. Contractual Life Remaining (in years)		Wgt. Avg. Exercise Price		Aggregate Intrinsic Value
$ 3.50	-	$ 3.86		13,000		5.2	$	3.75	$	528,960
$ 7.80				8,000		6.5	$	7.80	$	174,700
$ 19.99				20,000		6.5	$	19.99	$	376,200
$ 39.11				8,000		6.5	$	39.11	$	-
$ 3.50	-	$ 39.11		49,000		6.5	$	16.81	$	1,079,860