Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details) - Schedule of oil extraction and processing segment

v3.21.2
Segment Information (Details) - Schedule of oil extraction and processing segment - Segments [Member] - USD ($)
$ in Thousands
May 31, 2021
May 31, 2020
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]    
Additions to non-current assets $ 4,894 $ 2,762
Reportable segment assets 79,102 75,006
Reportable segment liabilities (20,042) (19,173)
Total 59,060 55,833
Oil Extraction [Member]    
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]    
Additions to non-current assets 4,894 2,152
Reportable segment assets 45,862 41,103
Reportable segment liabilities (19,882) (18,173)
Total 25,980 22,930
Mining Operations [Member]    
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]    
Additions to non-current assets 610
Reportable segment assets 33,240 33,903
Reportable segment liabilities (160) (1,000)
Total $ 33,080 $ 32,903