Note 7 - Stock Option Plans - Schedule of Restricted Stock (Details) - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2025 $ / shares shares
Non-vested as January 1, 2025 (in shares)	365,171
Non-vested as January 1, 2025 (in dollars per share) | $ / shares	$ 0.89
Granted, Shares (in shares)	0
Vested, Shares (in shares)	(182,584)
Vested, Weighted Average Grant-Date Fair Value per Award (in dollars per share) | $ / shares	$ 0.89
Cancelled, Shares (in shares)	(28,090)
Non-vested, Shares (in shares)	154,497