Note 8 - Other Non-current Assets - Schedule of Other Non-current Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Permitting costs(1)	[1]	$ 7,385	$ 2,637
Enterprise resource planning system, net		1,805	3,165
Rio Grande Site Lease initial direct costs		7,109	946
Total other non-current assets, net		$ 16,299	$ 6,748

[1] Permitting costs primarily represent costs incurred in connection with our permit applications to the United States Army Corps of Engineers and the U.S. Fish and Wildlife Service for wetlands and habitat mitigation measures for potential impacts to wetlands and habitat that may be caused by the construction of the Terminal.