Note 13 - Long-term Incentive Plan - Information on Outstanding Grants Made to Directors Under the LTIP (Details) - Long-Term Incentive Plan [Member] - Director [Member] - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Granted, weighted average grant date fair value (in dollars per share)	$ 3.26
Restricted Stock [Member]
Granted, number of units (in shares)		22,743	7,500	7,500
Granted, weighted average grant date fair value (in dollars per share)		$ 3.26	$ 2.06	$ 1.07
Grant Date Total Fair Value	$ 74	$ 74	$ 15	$ 8