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Revolving Credit Facility - Narrative (Details)
9 Months Ended
Apr. 29, 2019
Jun. 30, 2022
USD ($)
Apr. 29, 2022
USD ($)
Apr. 28, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 28, 2017
USD ($)
Line of Credit Facility [Line Items]            
Outstanding borrowings   $ 61,000,000     $ 60,000,000  
Line of Credit | Revolving Credit Facility            
Line of Credit Facility [Line Items]            
Borrowing base     $ 200,000,000 $ 175,000,000   $ 25,000,000
Maximum facility amount           $ 500,000,000
Cash balance threshold, borrowing base     10.00%      
Hedging requirement ratio for proved developed producing volumes, minimum     0.00%      
Hedging requirement ratio for proved developed producing volumes, maximum   25.00% 50.00%      
Hedging requirement ratio for proved developed producing volumes, term 24 months 24 months        
Weighted average interest rate   4.52%     2.83%  
Available under the credit facility   $ 139,000,000        
Line of Credit | Revolving Credit Facility | Minimum            
Line of Credit Facility [Line Items]            
Unused capacity, commitment fee percentage 0.375%          
Current ratio     1.0      
Leverage ratio for restricted payments after pro forma effect     2.0      
Line of Credit | Revolving Credit Facility | Minimum | SOFR Loan | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate            
Line of Credit Facility [Line Items]            
Basis spread on variable rate 2.75%          
Line of Credit | Revolving Credit Facility | Minimum | Base Rate Loan            
Line of Credit Facility [Line Items]            
Basis spread on variable rate 1.75%          
Line of Credit | Revolving Credit Facility | Maximum            
Line of Credit Facility [Line Items]            
Unused capacity, commitment fee percentage 0.50%          
Leverage ratio     3.25      
Leverage ratio for restricted payments     2.50      
Cash balance threshold, prepayment of lines of credit     $ 15,000,000      
Line of Credit | Revolving Credit Facility | Maximum | SOFR Loan | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate            
Line of Credit Facility [Line Items]            
Basis spread on variable rate 3.75%          
Line of Credit | Revolving Credit Facility | Maximum | Base Rate Loan            
Line of Credit Facility [Line Items]            
Basis spread on variable rate 2.75%