Note 11 - Income Taxes - Deferred Tax Assets and Liabilities (Details) (USD $)	Nov. 30, 2014	Nov. 30, 2013
Accrued expenses	$ 147,000	$ 168,000
Inventory capitalization	22,000us-gaap_DeferredTaxAssetsInventory	24,000us-gaap_DeferredTaxAssetsInventory
Asset reserves	1,091,000	1,036,000
Total current deferred tax assets	1,259,943	1,228,097
Property, plant, and equipment	(1,142,000)	(953,000)
Total non-current deferred tax assets (liabilities)	$ (1,141,580)	$ (952,645)

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed within one year or operating cycle, if longer.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from other reserves not separately disclosed.

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Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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