Note 3 - Acquisitions (Details Textual)		3 Months Ended
	Jun. 01, 2019 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Oct. 31, 2019 USD ($)
Payments to Acquire Oil and Gas Property and Equipment, Total		$ 309,000	$ 3,300,000
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	$ 615,000,000
Business Combination, Escrow Deposit					$ 61,500,000
Business Combination, Escrow Deposit Not Credited Toward Purchase Price				$ 15,000,000
HPK, LP [Member] | Grenadier Acquisition [Member]
Business Combination Terminated, Charge to Expense		$ 76,500,000