Note 6 - Stock Based Awards - Restricted Stock Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross	0
Restricted Stock [Member]
Outstanding – shares (in shares)	27,000
Outstanding – weighted average remaining contractual term (in dollars per share)	$ 1
Outstanding – aggregate intrinsic value	$ 160	$ 254
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross	0
Vested, shares (in shares)	(15,000)
Forfeited, shares (in shares)	0
Outstanding , shares (in shares)	12,000
Outstanding – weighted average remaining contractual term (in dollars per share)	$ 1