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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of financing receivable past due.

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Accounts Receivable and Revenues from Contracts with Customers - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021 USD ($) Customer	Mar. 31, 2020 USD ($) Customer	Jun. 30, 2020	Dec. 31, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Retained earnings (Accumulated deficit)	$ (4,218)			$ 9,354
Accounts Receivable, Allowance for Credit Loss	364			197
Accounts Receivable, Credit Loss Expense (Reversal)	167
Accounts Receivable, Allowance for Credit Loss, Writeoff	$ 0
Name of Major Customer [Domain]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commodity Products, Number of Customers \| Customer	16
Financing Receivable, Credit Risk Percentage	0.00%
Joint Interest Partners, Mutual Operators [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commodity Products, Number of Customers \| Customer	2
Financing Receivable, Credit Risk Percentage	5.00%
Accounts Receivable, Allowance for Credit Loss	$ 2			9
Accounts Receivable, Credit Loss Expense (Reversal)	(7)
Accounts Receivable, Allowance for Credit Loss, Writeoff	$ 0
Joint Interest Partners, Large Partners [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commodity Products, Number of Customers \| Customer	5
Financing Receivable, Credit Risk Percentage	2.00%
Accounts Receivable, Allowance for Credit Loss	$ 289			87
Accounts Receivable, Credit Loss Expense (Reversal)	202
Accounts Receivable, Allowance for Credit Loss, Writeoff	$ 0
Joint Interest Partners, All Others [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commodity Products, Number of Customers \| Customer	15
Financing Receivable, Credit Risk Percentage	10.00%
Financing Receivable, Past Due				200
Accounts Receivable, Allowance for Credit Loss	$ 73			101
Accounts Receivable, Credit Loss Expense (Reversal)	(28)
Accounts Receivable, Allowance for Credit Loss, Writeoff	$ 0
Accounts Receivable \| Credit Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	45.00%		61.00%
Accounts receivable, major customers	$ 23,500			$ 24,100
Accounts Receivable \| Customer Concentration Risk [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of major customers \| Customer	3	4
Revenues, major customers	$ (54,100)	$ (66,500)
Concentration risk, percentage	61.00%	73.00%
Accounts Receivable \| Customer Concentration Risk [Member] \| Major Customer 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues, major customers	$ (23,000)
Concentration risk, percentage	26.00%
Accounts Receivable \| Customer Concentration Risk [Member] \| Major Customer 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues, major customers	$ (20,100)
Concentration risk, percentage	23.00%
Accounts Receivable \| Customer Concentration Risk [Member] \| Major Customer 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues, major customers	$ (11,000)
Concentration risk, percentage	12.00%