Represents the amount released from escrow in connection with a business combination.

No definition available.

Name:	hpk_BusinessCombinationAmountOfDepositReleasedFromEscrow
Namespace Prefix:	hpk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of escrow deposit associated with a business combination.

+ References

No definition available.

+ Details

Name:	hpk_BusinessCombinationEscrowDeposit
Namespace Prefix:	hpk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of escrow deposit not to be credit toward the purchase price in connection with a business combination.

+ References

No definition available.

+ Details

Name:	hpk_BusinessCombinationEscrowDepositNotCreditedTowardPurchasePrice
Namespace Prefix:	hpk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of charge to expense from the termination of a business combination.

+ References

No definition available.

+ Details

Name:	hpk_BusinessCombinationTerminatedChargeToExpense
Namespace Prefix:	hpk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the number of salt water disposal wells acquired during the period.

+ References

No definition available.

+ Details

Name:	hpk_NumberOfSaltWaterDisposalWellsAcquired
Namespace Prefix:	hpk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of vertical producing properties acquired during the period.

+ References

No definition available.

+ Details

Name:	hpk_NumberOfVerticalProducingPropertiesAcquired
Namespace Prefix:	hpk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireOilAndGasPropertyAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=hpk_HighPeakEnergyAssetsIILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=hpk_GrenadierAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=hpk_HPKLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 3 - Acquisitions (Details Textual) $ in Thousands	1 Months Ended		4 Months Ended		8 Months Ended	9 Months Ended
Note 3 - Acquisitions (Details Textual) $ in Thousands	Oct. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Aug. 21, 2020 USD ($)	Sep. 30, 2020
Payments to Acquire Oil and Gas Property and Equipment, Total			$ 1,200		$ 3,300
Number of Vertical Producing Properties Acquired						3
Number of Salt Water Disposal Wells Acquired						2
HighPeak Energy Assets II, LLC [Member] \| Grenadier Acquisition [Member]
Payments to Acquire Businesses, Gross		$ 615,000
Business Combination, Escrow Deposit	$ 61,500
HPK, LP [Member] \| Grenadier Acquisition [Member]
Payments to Acquire Businesses, Gross	30,750
Business Combination, Amount of Deposit Released from Escrow	30,750
Business Combination, Escrow Deposit Not Credited Toward Purchase Price	$ 15,000
Business Combination Terminated, Charge to Expense				$ 76,500