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Concentrations (Details Narrative)
$ in Thousands
9 Months Ended
Sep. 30, 2021
USD ($)
integer
Dec. 31, 2020
USD ($)
Concentration Risk [Line Items]    
Number of minimg tenants | integer 5  
Accounts receivable $ 991 $ 923
Mining Top Customer [Member]    
Concentration Risk [Line Items]    
Top lessee rent percent 23.80%  
Accounts receivable $ 294