Note 4 - Inventories (Details Textual) - USD ($)	May 31, 2026	Feb. 28, 2026
Inventory, Net	$ 4,567,000	$ 4,132,000
Wafer Bank Inventory [Member]
Inventory, Net	$ 61,000	$ 61,000

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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Balance Type:	debit
Period Type:	instant