Note 4 - Commitments and Contingencies (Details Textual) $ in Millions	6 Months Ended
Jun. 30, 2026 USD ($)
Litigation Affecting Certain Leasehold in Midland County, Texas [Member]
Proceeds from Legal Settlements	$ 15.5

Cash received for the settlement of litigation during the current period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 25
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-25

Name:	us-gaap_ProceedsFromLegalSettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration