Note 3 - Sale of Equity Interests in Rio Bravo (Details Textual) - Rio Bravo [Member] - USD ($) $ in Millions		1 Months Ended
Mar. 02, 2020	Jul. 31, 2023
Disposal Group, Including Discontinued Operation, Consideration	$ 19.4
Proceeds from Divestiture of Businesses	$ 15.0	$ 4.4

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-12

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