Note 8 - Accrued Liabilities and Other Current Liabilities - Summary of Accrued Liabilities and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Employee compensation expense	$ 478	$ 4,221
Terminal and Pipeline asset costs	529	2,503
Accrued legal services	35	1,060
Other accrued liabilities	252	967
Total accrued liabilities and other current liabilities	$ 1,294	$ 8,751