Note 9 - Stock Incentive Plan - Share Based Compensation Arrangements by Share Based Payment Award (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Stock based compensation	$ 939	$ 552
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)	29,091	14,227
Granted and vested, grant date fair value (in dollars per share)	$ 10.50	$ 16.52
Outstanding, shares (in shares)	83,288	42,822
Outstanding, grant date fair value (in dollars per share)	$ 16.87	$ 23.46
Stock based compensation	$ 279	$ 239
Intrinsic value, end of period	$ 709	$ 351