Note 7 - Other Non-current Assets (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Other Assets, Noncurrent [Table Text Block]

	December 31,		December 31,
	2022		2021
Permitting costs(1)	$	8,575	$	7,609
Enterprise resource planning system, net		—		354
Rio Grande Site Lease initial direct costs		19,612		13,314
Deposits and other		185		35
Total other non-current assets, net	$	28,372	$	21,312