Business Combinations - Allocation of the Purchase Price (Details) - Riley Exploration $ in Thousands	Feb. 26, 2021 USD ($)
Current assets
Cash and cash equivalents	$ 860
Account receivable	325
Prepaid and other current assets	759
Total current assets	1,944
Non-current assets
Oil and gas properties, net	4,525
Other property and equipment, net	91
Right of use assets	42
Other non-current assets	4
Deferred tax assets	2,943
Total non-current assets	7,605
Total assets acquired	9,549
Current liabilities
Accounts payable	130
Accrued liabilities	409
Current lease liabilities, operating	42
Current lease liabilities, financing	68
Total current liabilities	649
Non-current liabilities
Asset retirement obligations	1,565
Total non-current liabilities	1,565
Total liabilities assumed	2,214
Net identifiable assets acquired	7,335
Goodwill	19,057
Net assets acquired	$ 26,392