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Note 11 - Related Party Transactions (Details Textual) Pure in Millions, $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 USD ($) | May 31, 2022 USD ($)
Water Treatment Services [Member] |  |
Related Party Transaction, Amounts of Transaction | $ 1.4 |
Pilot Exploration Inc. [Member] |  |
Supply Commitment, Minimum Barrels of Produced Water |  | 29.2
Supply Commitment, Amount Committed |  | $ 6.0

X
- Definition Represents amount committed for supply commitment. + References No definition available. + Details
Name: | hpk_SupplyCommitmentAmountCommitted
Namespace Prefix: | hpk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum barrels of produced water under supply commitment. + References No definition available. + Details
Name: | hpk_SupplyCommitmentMinimumBarrelsOfProducedWater
Namespace Prefix: | hpk_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 + Details
Name: | us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=hpk_WaterTreatmentServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=hpk_PilotExplorationIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |