Note B - Inventories (Details Textual) - Boat Management System Product Line [Member] - USD ($) $ in Millions	3 Months Ended
Mar. 29, 2024	Dec. 29, 2023	Sep. 29, 2023
Inventory Write-down	$ 2.1		$ 2.1
UNITED STATES
Inventory Write-down		$ 1.6

Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 330
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483080/330-10-50-2

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