Oil and Natural Gas Properties - Additional Information (Details)			3 Months Ended		12 Months Ended
	Nov. 21, 2017 well	Feb. 21, 2017 well phase	Mar. 31, 2020 USD ($) well	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2017 arrangements
Business Acquisition [Line Items]
Business combination, consideration transferred					$ 44,000,000.0
Acquisition-related costs					100,000
Issuance of common units, net of offering costs				$ (43,000)
Number of arrangements | arrangements						2
Impairment of oil and natural gas properties			$ 51,031,000	$ 0
East Texas
Business Acquisition [Line Items]
Payments to acquire oil, mineral, and royalty interests					31,600,000
2019 Acquisitions
Business Acquisition [Line Items]
Payments to acquire oil, mineral, and royalty interests					30,700,000
Issuance of common units, net of offering costs					900,000
Angelina County, Texas | Farmout Agreement
Business Acquisition [Line Items]
Business combination, ownership interest, acreage, percent		50.00%
Exploratory wells, expected to be drilled | well		20
Oil, productive well, number of wells, net | well			17
Exploratory wells, additional wells to be drilled | well		20
Asset acquisition, number of phases | phase		3
Canaan Resource Partners | Angelina County, Texas | Farmout Agreement
Business Acquisition [Line Items]
Asset acquisition, term of phase		2 years
Asset acquisition, funding requirements, drilling and completion costs, percent		80.00%
Asset acquisition, ownership interest in wells, percent		80.00%
Asset acquisition, ownership interest, gross, percent		40.00%
Asset acquisition, third phase, ownership interest in additional wells, percent		40.00%
Asset acquisition, third phase, ownership interest in additional wells, gross, percent		20.00%
Asset acquisition, third phase, funding requirements, drilling and completion costs, percent		40.00%
Business combination, pro forma information, revenue of acquiree since acquisition date, actual			$ 90,300,000
Pivotal | San Augustine County, Texas | Farmout Agreement
Business Acquisition [Line Items]
Exploratory wells, expected to be drilled | well	80
Oil, productive well, number of wells, net | well			68
Asset acquisition, ownership interest, gross, percent	10.00%
Business combination, pro forma information, revenue of acquiree since acquisition date, actual			$ 118,600,000
Asset acquisition, ownership interest, in wells operated by others, percent	100.00%
Other long-term liabilities | Canaan Resource Partners | Angelina County, Texas | Farmout Agreement
Business Acquisition [Line Items]
Business combination, pro forma information, working interests in wells drilled and completed, actual			$ 100,000		$ 1,700,000
Minimum | Pivotal | San Augustine County, Texas | Farmout Agreement
Business Acquisition [Line Items]
Asset acquisition, ownership interest, in wells operated by others, gross, percent	12.50%
Maximum | Pivotal | San Augustine County, Texas | Farmout Agreement
Business Acquisition [Line Items]
Asset acquisition, ownership interest, in wells operated by others, gross, percent	25.00%