Note 15 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)	Nov. 30, 2018	Nov. 30, 2017
Accrued expenses	$ 59,000	$ 95,000
Inventory capitalization	73,000	33,000
Net operating loss and tax credit carryforward	826,000	586,000
Asset reserves	609,000	746,000
Total current deferred tax assets	1,567,000	1,460,000
Property, plant, and equipment	(135,000)	(559,000)
Total non-current deferred tax assets (liabilities)	(135,000)	(559,000)
Net deferred taxes	$ 1,432,000	$ 901,000