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REVENUE FROM CONTRACTS WITH CUSTOMERS - DISAGGREGATION OF REVENUE (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Disaggregation of Revenue [Line Items]        
Revenue before interest income $ 3,998 $ 4,573 $ 8,385 $ 9,416
Oil        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 1,933 1,478 3,313 3,203
Natural gas        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 461 307 836 629
Natural gas liquids        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 158 125 290 219
Drilling and pump        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 1,389 2,593 3,331 5,239
Contingent residual payments        
Disaggregation of Revenue [Line Items]        
Revenue before interest income     485  
Other        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 57 70 130 126
United states        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 1,393 2,593 3,820 5,246
Canada        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,605 1,980 4,565 4,170
Goods transferred at a point in time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,609 1,980 5,054 4,177
Services transferred over time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 1,389 2,593 3,331 5,239
Oil and natural gas        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,552 1,910 4,439 4,051
Oil and natural gas | Oil        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 1,933 1,478 3,313 3,203
Oil and natural gas | Natural gas        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 461 307 836 629
Oil and natural gas | Natural gas liquids        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 158 125 290 219
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  
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 0 0 0 0
Oil and natural gas | Canada        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,552 1,910 4,439 4,051
Oil and natural gas | Goods transferred at a point in time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 2,552 1,910 4,439 4,051
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 1,389 2,593 3,331 5,239
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 1,389 2,593 3,331 5,239
Contract drilling | Contingent residual payments        
Disaggregation of Revenue [Line Items]        
Revenue before interest income     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 1,389 2,593 3,331 5,239
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 1,389 2,593 3,331 5,239
Land investment        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 0 0 485 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     485  
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 0 0 485 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 0 0 485 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 57 70 130 126
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  
Other | Other        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 57 70 130 126
Other | United states        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 4 0 4 7
Other | Canada        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 53 70 126 119
Other | Goods transferred at a point in time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income 57 70 130 126
Other | Services transferred over time        
Disaggregation of Revenue [Line Items]        
Revenue before interest income $ 0 $ 0 $ 0 $ 0