Note 13 - Long-term Incentive Plan - Information on Outstanding Grants Made to Directors Under the LTIP (Details) - Long-Term Incentive Plan [Member] - Restricted Stock [Member] - Director [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Granted, number of units (in shares)	7,500	23,436	15,306
Granted, weighted average grant date fair value (in dollars per share)	$ 1.07	$ 1.20	$ 4.85
Grant Date Total Fair Value	$ 8	$ 28	$ 74