Note 11 - Treasury Stock (Details Textual) - USD ($) $ in Millions	Jan. 31, 2024	Dec. 07, 2022	Oct. 04, 2021
Share Repurchase Program, Authorized, Amount		$ 1	$ 3
Stock Repurchase Program, Authorized Repurchase Amount Used	$ 1

Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

Name:	srt_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	srt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant