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INFORMATION RELATING TO THE CONSOLIDATED STATEMENTS OF CASH FLOWS (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Increase (decrease) from changes in:    
Receivables $ (814) $ (598)
Income tax receivable 457 129
Other current assets (920) 260
Accounts payable (746) 924
Accrued compensation 668 203
Other current liabilities (796) (470)
(Decrease) increase from changes in current assets and liabilities (2,151) 448
Supplemental disclosure of cash flow information:    
Income taxes refunded, net (303) (166)
Supplemental disclosure of non-cash investing and financing activities:    
Canadian income tax withholding on proceeds from sale of oil and natural gas properties 598 0
Supplemental disclosures of cash flow information:    
Increase (decrease) in capital expenditure accruals related to oil and natural gas asset retirement obligations 811 (52)
Oil and natural gas    
Supplemental disclosures of cash flow information:    
Increase in capital expenditure accruals related to oil and natural gas exploration and development 346 435
Increase (decrease) in capital expenditure accruals related to oil and natural gas asset retirement obligations $ 811 $ (52)