Note 6 - Equity - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	1 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2023	Dec. 31, 2022
Unvested Shares, number of shares (in shares)		40,499
Unvested Shares, weighted average grant date fair value (in dollars per share)		$ 33.6
Unvested Shares, weighted average remaining contractual term (Year)		7 years 3 months 18 days	3 years 1 month 6 days
Granted, number of shares (in shares)	30,156	65,292
Granted, weighted average grant date fair value (in dollars per share)	$ 22.35	$ 9
Vested, number of shares (in shares)		(11,901)
Vested, weighted average grant date fair value (in dollars per share)		$ 41.55
Unvested Shares, number of shares (in shares)		93,890	40,499
Unvested Shares, weighted average grant date fair value (in dollars per share)		$ 15.45	$ 33.6