Note 14 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)	Nov. 30, 2022	Nov. 30, 2021
Accrued expenses	$ 93,000	$ 82,000
Inventory capitalization	167,000	122,000
NOL and tax credit carryforward	1,921,000	1,846,000
Asset reserves	521,000	613,000
Total current deferred tax assets	2,702,000	2,663,000
Property, plant, and equipment	(97,000)	(41,000)
Total non-current deferred tax assets (liabilities)	(97,000)	(41,000)
Net deferred taxes	$ 2,605,000	$ 2,622,000