Note 8 - Shareholders' Equity - Restricted Stock Activity (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Outstanding, shares (in shares)	18,372	15,140
Outstanding, weighted average grant date price (in dollars per share)	$ 4	$ 7.14
Granted to employees and directors, shares (in shares)	227,000	21,772
Granted to employees and directors, weighted average grant date price (in dollars per share)	$ 4.23	$ 4
Vested, shares (in shares)	(10,200)	(18,540)
Vested, weighted average grant date price (in dollars per share)	$ 3.99	$ 6.56
Canceled/expired/forfeited, shares (in shares)	0	0
Canceled/expired/forfeited, weighted average grant date price (in dollars per share)	$ 0	$ 0
Outstanding, shares (in shares)	235,172	18,372
Outstanding, weighted average grant date price (in dollars per share)	$ 4.21	$ 4