Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual)		1 Months Ended		6 Months Ended		12 Months Ended
		Nov. 30, 2022 USD ($)	Feb. 28, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Nov. 14, 2022
Accounts Receivable, after Allowance for Credit Loss, Current, Total				$ 100,974,000		$ 96,596,000
Oil and Gas Joint Interest Billing Receivables				17,200,000		2,200,000
Income Taxes Receivable				3,200,000		3,200,000
Accounts Receivable, Allowance for Credit Loss, Current				0		0
Inventory, Raw Materials and Supplies, Gross, Total				9,200,000		13,300,000
Inventory, LIFO Reserve				0		0
Prepaid Expense				3,200,000		4,100,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance				794,000		696,000
Accounts Payable and Accrued Liabilities, Current, Total				1,100,000,000		266,100,000
Payments of Debt Issuance Costs				1,399,000	$ 9,098,000
Amortization of Debt Issuance Costs				5,704,000	1,781,000
Debt Instrument, Unamortized Discount, Total	[1]			18,459,000		$ 27,086,000
Amortization of Debt Discount (Premium)				$ 8,627,000	2,741,000
Number of Operating Segments				1
Minimum [Member]
Oil and Natural Gas Marketing Contracts, Term Over Which Consideration is Received from Purchaser (Month)				1 month
Maximum [Member]
Oil and Natural Gas Marketing Contracts, Term Over Which Consideration is Received from Purchaser (Month)				2 months
Revolving Credit Facility [Member] | Fifth Third Bank, National Association [Member]
Deferred Debt Refinancing Costs, Current				$ 727,000
Senior Unsecured Notes and Revolving Credit Facility [Member]
Debt Issuance Costs, Gross				20,400,000
Payments of Debt Issuance Costs				672,000
Amortization of Debt Issuance Costs				$ 5,700,000	1,800,000
Senior Unsecured Notes Due 2024 [Member]
Payments of Debt Issuance Costs			$ 22,100,000
Debt Instrument, Interest Rate, Stated Percentage			10.00%	10.00%
Debt Instrument, Unamortized Discount, Total				$ 34,800,000
Amortization of Debt Discount (Premium)				$ 8,600,000	$ 2,700,000
The 10.625% Senior Notes [Member]
Payments of Debt Issuance Costs		$ 223,700,000
Debt Instrument, Interest Rate, Stated Percentage				10.625%			10.625%
Transportation Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)				5 years
Building [Member]
Property, Plant and Equipment, Useful Life (Year)				40 years
Field Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)				7 years
Furniture and Fixtures [Member]
Property, Plant and Equipment, Useful Life (Year)				5 years
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Customers				2		2
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Largest Purchasers [Member]
Concentration Risk, Percentage				96.00%		94.00%
Electric Power Infrastructure [Member]
Accounts Receivable, after Allowance for Credit Loss, Current, Total				$ 0		$ 4,900,000
Settlements of Derivative Contracts [Member]
Accounts Receivable, after Allowance for Credit Loss, Current, Total				0		4,700,000
Aid-in-construction Receivables [Member] | WTG Gas Processing, L.P. [Member]
Accounts Receivable, after Allowance for Credit Loss, Total				5,900,000		6,100,000
Crude Oil, Natural Gas and Natural Gas Liquids [Member]
Accounts Receivable, after Allowance for Credit Loss, Current, Total				$ 80,600,000		$ 81,600,000

[1] Discounts as of June 30, 2023 and December 31, 2022 consisted of $34.8 million and $34.8 million, respectively, in discounts less accumulated amortization of $16.4 million and $7.7 million, respectively.