Derivative Notional Amount1

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The average strike price on the group of price risk option contracts such as put options or call options.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeAveragePriceRiskOptionStrikePrice
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal flow rate used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountFlowRate
Namespace Prefix:	us-gaap_
Data Type:	us-types:flowItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix:	us-gaap_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=lone_OilWTISwapsJanuaryToDecemberTwoThousandTwentyOneMember
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- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=lone_NaturalGasHenryHubSwapsJanuaryToDecemberTwoThousandTwentyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
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Data Type:	na
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- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
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Commodity Price Risk Activities - Additional Information (Details)	1 Months Ended		12 Months Ended
	Mar. 31, 2020 bbl / d bbl Mcf	Jan. 31, 2020 Mcf / d bbl	Dec. 31, 2019 bbl Mcf	Mar. 30, 2020 USD ($)	Mar. 01, 2020 $ / bbl	Jan. 01, 2020 $ / bbl
Oil WTI Swaps January-December 2021
Derivative [Line Items]
Derivative contracts, aggregate volume \| bbl			4,000
Natural Gas Henry Hub Swaps January-December 2020
Derivative [Line Items]
Derivative contracts, aggregate volume \| Mcf			20,000
Subsequent Event \| Oil WTI Swaps January-December 2021
Derivative [Line Items]
Derivative contracts, aggregate volume \| bbl	730,000	365,000
Derivative contracts, flow rate	2,000	1,000
Derivative contract weighted average strike price \| $ / bbl					41	55.05
Subsequent Event \| Natural Gas Henry Hub Swaps January-December 2020
Derivative [Line Items]
Derivative contracts, aggregate volume \| Mcf	10,037,500
Derivative contracts, flow rate \| bbl / d	27,500
Derivative contract weighted average strike price \| $ / bbl					2.36
Subsequent Event \| Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount \| $				$ 190,000,000
Derivative, interest rate				0.68%