Note 6 - Stockholders' Equity - Warrants (Details) - USD ($)	9 Months Ended
	Sep. 30, 2024	Jan. 01, 2024
Outstanding (in shares)	314,572
Outstanding (in dollars per share)	$ 0.5
Outstanding (Year)	1 month 6 days
Outstanding	$ 0	$ 59,737
Issued, number of shares (in shares)	0
Issued, weighted average exercise price (in dollars per share)	$ 0
Exercised, number of shares (in shares)	(103,500)
Exercised, weighted average exercise price (in dollars per share)	$ 0.5
Expired or cancelled, number of shares (in shares)	(211,072)
Expired or cancelled, weighted average exercise price (in dollars per share)	$ 0.5
Outstanding (in shares)	0
Outstanding (in dollars per share)	$ 0