Note 5 - Common Stock - Summary of Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Granted, options (in shares) | shares	76,848
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 2.01
Outstanding, options (in shares) | shares	76,848
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 2.01