Note 11 - Stock Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2024

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
	2024		2023		2024		2023		2024		2023		2024		2023
2003 Incentive Stock Plan1 §		N/A		N/A		-		-		-		-		-		-
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 † §		10,800		6,021		N/A		N/A		N/A		N/A		N/A		N/A
2022 Employee Stock Incentive Plan6 † §		486,846		-		-		-		-		-		6,848		-

	Total of All Plans		Fully Vested and Exercisable		Not Vested
Stock Incentives Granted		1,877,798		59,000		-
Stock Incentives Exercised		1,014,820		N/A		N/A
Stock Incentives Cancelled		289,528		N/A		N/A

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

	2024			2023
Stock Options outstanding at January 1		59,000			59,000
Stock Options cancelled		-			-
Stock Options exercised		-			-
Stock Options granted		-			-
Stock Options outstanding at December 31		59,000			59,000
Stock Options available for grant at December 31		428,702			926,348
Stock Options exercisable at December 31		59,000			59,000
Exercise price ranges per share:
Granted		N/A			N/A
Exercised		N/A			N/A
Outstanding	$ 3.50	-	$ 39.11	$ 3.50	-	$ 39.11
Weighted average exercise price per share:
Granted		-			-
Exercised		-			-
Outstanding at December 31	$	17.35		$	17.35
Exercisable at December 31	$	17.35		$	17.35

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		2.2	$	3.75	$	233,100
$7.80				8,000		3.4	$	7.80	$	11,040
$19.99				30,000		4.1	$	19.99	$	50,700
$39.11				8,000		4.4	$	39.11	$	-
$3.50	-	$39.11		59,000		3.6	$	17.35	$	394,840

Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

	Number of Restricted Stock Units			Weighted-average grant date fair value per share
Balance as of December 31, 2023		-		$	-
Granted		486,846			12.58
Vested		-			-
Canceled and forfeited		(6,848	)		12.34
Balance as of December 31, 2024		479,998		$	12.59

Year ended December 31, (in thousands)	2024		2023
General and administrative expense	$	385	$	150
Development expense		923		--
Total	$	1,308	$	150