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Note 6 - Other Non-current Assets - Schedule of Other Non-current Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Permitting costs | [1] | $ 8,110 | $ 7,644
Enterprise resource planning system, net |  | 0 | 354
Rio Grande Site Lease initial direct costs |  | 16,456 | 13,314
Total other non-current assets, net |  | $ 24,566 | $ 21,312
[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.

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- Definition The amount of permitting costs classified as noncurrent. + References No definition available. + Details
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- Definition The amount of site lease initial direct costs. + References No definition available. + Details
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- Definition Amount of noncurrent assets classified as other. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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