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REVENUE FROM CONTRACTS WITH CUSTOMERS - DISAGGREGATION OF REVENUE (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Disaggregation of Revenue [Line Items]        
Revenue before interest income $ 5,108 $ 3,983 $ 13,493 $ 13,399
Oil        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,156 624 5,469 3,827
Natural gas        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 514 192 1,350 821
Natural gas liquids        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 217 14 507 233
Drilling and pump        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 889 3,040 4,220 8,279
Contingent residual payments        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 1,253   1,738  
Other        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 79 113 209 239
United states        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,185 3,040 6,005 8,286
Canada        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,923 943 7,488 5,113
Goods transferred at a point in time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 4,219 943 9,273 5,120
Services transferred over time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 889 3,040 4,220 8,279
Oil and natural gas        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,887 830 7,326 4,881
Oil and natural gas | Oil        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,156 624 5,469 3,827
Oil and natural gas | Natural gas        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 514 192 1,350 821
Oil and natural gas | Natural gas liquids        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 217 14 507 233
Oil and natural gas | Drilling and pump        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Oil and natural gas | Contingent residual payments        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0   0  
Oil and natural gas | Other        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Oil and natural gas | United states        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 41 0 41 0
Oil and natural gas | Canada        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,846 830 7,285 4,881
Oil and natural gas | Goods transferred at a point in time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,887 830 7,326 4,881
Oil and natural gas | Services transferred over time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Contract drilling        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 889 3,040 4,220 8,279
Contract drilling | Oil        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Contract drilling | Natural gas        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Contract drilling | Natural gas liquids        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Contract drilling | Drilling and pump        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 889 3,040 4,220 8,279
Contract drilling | Contingent residual payments        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0   0  
Contract drilling | Other        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Contract drilling | United states        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 889 3,040 4,220 8,279
Contract drilling | Canada        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Contract drilling | Goods transferred at a point in time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Contract drilling | Services transferred over time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 889 3,040 4,220 8,279
Land investment        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 1,253 0 1,738 0
Land investment | Oil        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Land investment | Natural gas        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Land investment | Natural gas liquids        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Land investment | Drilling and pump        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Land investment | Contingent residual payments        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 1,253   1,738  
Land investment | Other        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Land investment | United states        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 1,253 0 1,738 0
Land investment | Canada        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Land investment | Goods transferred at a point in time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 1,253 0 1,738 0
Land investment | Services transferred over time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Other        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 79 113 209 239
Other | Oil        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Other | Natural gas        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Other | Natural gas liquids        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Other | Drilling and pump        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 0 0
Other | Contingent residual payments        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0   0  
Other | Other        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 79 113 209 239
Other | United states        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2 0 6 7
Other | Canada        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 77 113 203 232
Other | Goods transferred at a point in time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 79 113 209 239
Other | Services transferred over time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income $ 0 $ 0 $ 0 $ 0