Note 7 - Other Non-current Assets (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Schedule of Other Assets, Noncurrent [Table Text Block]

	June 30,		December 31,
	2023		2022
Permitting costs(1)	$	9,006	$	8,540
Rio Grande Site Lease initial direct costs		22,877		19,647
Deposits and other		185		185
Total other non-current assets, net	$	32,068	$	28,372