Note 8 - Stock Incentive Plan - Share Based Compensation Arrangements by Share Based Payment Award (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Stock based compensation	$ 652	$ 404
Deferred Stock Units [Member]
Outstanding, shares (in shares)	54,197	28,595
Outstanding, grant date fair value (in dollars per share)	$ 20.29	$ 26.92
Granted and vested, shares (in shares)	18,713	8,176
Granted and vested, grant date fair value (in dollars per share)	$ 10.64	$ 18.30
Outstanding, shares (in shares)	72,910	36,771
Outstanding, grant date fair value (in dollars per share)	$ 17.82	$ 25.00
Stock based compensation	$ 164	$ 153
Intrinsic value, end of period	$ 755	$ 524