Note 9 - 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		1 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Granted, number of units (in shares)		7,500	23,436	15,306
Weighted Average Grant Date Fair Value (in dollars per share)	[1]	$ 1.07	$ 1.20	$ 4.85
Grant Date Total Fair Value		$ 8	$ 28	$ 74

[1] Fair value is the closing market price on the grant date of the awards.