Note 7 - Accrued Liabilities and Other Current Liabilities - Summary of Accrued Liabilities and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Employee compensation expense	$ 2,410	$ 6,650
Terminal costs	15,826	12,046
Permitting costs, Current	140	279
Accrued legal services	9,284	3,124
Share-based compensation liability	182	182
Other accrued liabilities	819	903
Total accrued liabilities and other current liabilities	$ 28,661	$ 23,184