Annual report pursuant to Section 13 and 15(d)

Note 8 - Restricted Deposits for ARO (Details Textual)

v3.20.4
Note 8 - Restricted Deposits for ARO (Details Textual) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Restricted Deposits for Asset Retirement Obligations [Member]    
Escrow Deposit $ 13,900  
Other Noncurrent Liabilities [Member]    
Escrow Liability, Noncurrent $ 11,103 $ 0