Note B - Inventories - Schedule of Potential Impact of LIFO Valuation to FIFO Valuation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cost of Sales	$ 2,576	$ (228)	$ 4,925
Net Earnings	$ (2,053)	$ 186	$ (3,925)
Earnings Per Share (in dollars per share)	$ (0.29)	$ 0.03	$ (0.55)

The change in the inventory reserve representing the cumulative difference in cost between the first in, first out and the last in, first out inventory valuation methods, which change has been reflected in the statement of income during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 330
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.L)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480581/330-10-S99-1

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