Note 7 - Other Non-current Assets - Schedule of Other Non-current Assets (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Permitting costs(1)	[1]	$ 7,362	$ 2,621
Enterprise resource planning system, net		2,159	3,181
Rio Grande Site Lease initial direct costs		5,575	946
Total other non-current assets, net		$ 15,096	$ 6,748

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