Income Taxes (Details) (USD $)	Nov. 30, 2014	Nov. 30, 2013
Deferred tax assets, net:
Net operating loss carryforwards	$ 10,930,000	$ 9,233,000
Allowance for doubtful accounts		1,000
Accrued pension	680,000	648,000
Interest	560,000pvsp_DeferredTaxAssetsInterest	1,078,000pvsp_DeferredTaxAssetsInterest
Other	10,000us-gaap_DeferredTaxAssetsOther	9,000us-gaap_DeferredTaxAssetsOther
Deferred tax assets, Gross	12,180,000us-gaap_DeferredTaxAssetsGross	10,969,000us-gaap_DeferredTaxAssetsGross
Valuation allowance	12,180,000	10,969,000
Net deferred assets

Deferred Tax Assets Interest

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.

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

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

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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