Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities:
Net income (loss)	$ (59,819)	$ 68,212
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Non-cash discontinued operations	18,606	0
Oil and gas lease expirations	5,827	547
Depletion, depreciation, amortization and accretion	12,241	10,992
(Gain) Loss on derivatives	38,812	(51,204)
Settlements on derivative contracts	2,579	5,492
Amortization of deferred financing costs	316	318
Unit-based compensation expense	689	359
Stock-based compensation expense	4,571	0
Deferred income tax expense	12,938	0
Changes in operating assets and liabilities:
Accounts receivable	(3,477)	1,528
Accounts receivable – related parties	(122)	(1,247)
Prepaid expenses and other current assets	(433)	1,133
Other non-current assets	1	35
Accounts payable and accrued liabilities	1,366	(2,617)
Income taxes payable	778	0
Revenue payable	3,253	951
Net Cash Provided By Operating Activities - Continuing Operations	38,146	36,252
Cash Flows From Investing Activities:
Additions to oil and natural gas properties	(17,133)	(33,712)
Acquisition of oil and natural gas properties	(171)	(3,976)
Additions to other property and equipment	(380)	(53)
Tengasco acquired cash	859	0
Net Cash Used In Investing Activities - Continuing Operations	(16,825)	(37,741)
Cash Flows From Financing Activities:
Deferred financing costs	(129)	(267)
Proceeds from revolving credit facility	5,500	14,000
Repayment under revolving credit facility	(9,000)	(2,000)
Payment of common unit dividends	(7,841)	(10,347)
Payment of preferred unit dividends	(1,491)	0
Purchase of common units under long-term incentive plan	(191)	(318)
Net Cash Provided by (Used In) Financing Activities - Continuing Operations	(13,152)	1,068
Net Increase (Decrease) in Cash and Cash Equivalents from Continuing Operations	8,169	(421)
Cash Flows from Discontinued Operations:
Operating activities	238	0
Financing activities	(5)	0
Net Increase in Cash and Cash Equivalents from Discontinued Operations	233	0
Net Increase (Decrease) in Cash and Cash Equivalents	8,402	(421)
Cash and Cash Equivalents, Beginning of Period	1,660	3,726
Cash and Cash Equivalents, End of Period	10,062	3,305
Cash Paid For:
Interest	1,856	2,396
Non-cash Investing and Financing Activities - Continuing Operations:
Changes in capital expenditures in accounts payable and accrued liabilities	9,471	5,027
Common unit dividends incurred but not paid	84	25
Asset retirement obligations	53	859
Preferred unit dividends paid in kind	904	1,715
Preferred unit dividends	0	1,741
Dividends declared on common shares	4,991	0
Common stock issued in exchange for common units	192,191	0
Assets acquired and liabilities assumed in business combination	3,497	0
Common shares issued for business combination	26,392	0
Preferred units converted to common units	61,196	0
Non-cash Investing and Financing Activities - Discontinued Operations:
Goodwill incurred in business combination	19,057	0
Assets acquired and liabilities assumed for business combination	2,978	0
Joint interest owner
Changes in operating assets and liabilities:
Advances from joint interest owners and related parties	20	1,091
Related party
Changes in operating assets and liabilities:
Advances from joint interest owners and related parties	$ 0	$ 662