Note 14 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)	Nov. 30, 2016	Nov. 30, 2015
Accrued expenses	$ 110,000	$ 126,000
NOL and tax credit carryforward	133,000
Inventory capitalization	16,000	21,000
Inventory obsolescence and other asset reserves	808,000	999,000
Total current deferred tax assets	1,066,740	1,146,242
Property, plant, and equipment	(737,000)	(847,000)
Total non-current deferred tax assets (liabilities)	$ (737,519)	$ (846,960)