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           Summary of Tax Credit Carryforwards (Details) (USD $) 
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        12 Months Ended | 
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           Nov. 30, 2012 
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| Income Taxes Summary Of Tax Credit Carryforwards 1 | $ 188,494 | 
| Income Taxes Summary Of Tax Credit Carryforwards 2 | 609,991 | 
| Income Taxes Summary Of Tax Credit Carryforwards 3 | 1,731,495 | 
| Income Taxes Summary Of Tax Credit Carryforwards 4 | 3,174,989 | 
| Income Taxes Summary Of Tax Credit Carryforwards 5 | 2,792,560 | 
| Income Taxes Summary Of Tax Credit Carryforwards 6 | 2,044,857 | 
| Income Taxes Summary Of Tax Credit Carryforwards 7 | 854,218 | 
| Income Taxes Summary Of Tax Credit Carryforwards 8 | 1,056,516 | 
| Income Taxes Summary Of Tax Credit Carryforwards 9 | $ 12,453,120 | 
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          Income Taxes Summary Of Tax Credit Carryforwards 8 No definition available. 
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          Income Taxes Summary Of Tax Credit Carryforwards 1 No definition available. 
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          Income Taxes Summary Of Tax Credit Carryforwards 9 No definition available. 
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          Income Taxes Summary Of Tax Credit Carryforwards 3 No definition available. 
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          Income Taxes Summary Of Tax Credit Carryforwards 6 No definition available. 
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          Income Taxes Summary Of Tax Credit Carryforwards 7 No definition available. 
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          Income Taxes Summary Of Tax Credit Carryforwards 5 No definition available. 
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          Income Taxes Summary Of Tax Credit Carryforwards 2 No definition available. 
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          Income Taxes Summary Of Tax Credit Carryforwards 4 No definition available. 
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