Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies (Details Textual)

v2.4.0.6
Significant Accounting Policies (Details Textual) (USD $)
12 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2010
Significant Accounting Policies (Textual) [Abstract]      
Estimated useful lives of assets 20 years    
Other costs $ 1,940,793 $ 107,679  
Significant Accounting Policies (Additional Textual) [Abstract]      
Estimated percentage of income allocated to investment income 3.00%    
Estimated percentage of income allocated to distributions received from investment securities 97.00%    
Net distributions and dividend income on securities   448,000  
Net distributions and dividend income on securities, per share   $ 0.05  
Net distributions and dividend income on securities, Net of Deferred Tax   281,000  
Distributions and dividend income on securities per share net of deferred tax   $ 0.03  
Realized and unrealized gains on trading and other equity securities   448,000  
Realized and unrealized gains on trading and other equity securities, per share   $ 0.05  
Realized and unrealized gains on trading and other equity securities, Net of Deferred Tax   281,000  
Realized and unrealized gains on trading and other equity securities, per share, Net of Deferred Tax   $ 0.03  
Percentage of qualified dividend income included in the distribution of company's tax 100.00% 100.00% 100.00%
Federal income tax rate for a corporation 35.00% 35.00% 34.00%
Percentage of federal alternative minimum tax 20.00%    
Deferred lease costs 754,000    
Deferred lease costs, amortization period 15 years    
Issuance of Equity [Member]
     
Significant Accounting Policies (Textual) [Abstract]      
Offering costs 617,000    
Issuance of Debt [Member]
     
Significant Accounting Policies (Textual) [Abstract]      
Other costs 437,000    
Deferred costs amortization period 3 years    
Pinedale Liquids Gathering System [Member]
     
Significant Accounting Policies (Textual) [Abstract]      
Asset acquisition costs related to the Pinedale LGS acquisition $ 189,000    
Asset acquisition costs depreciation period 26 years    
Maximum [Member]
     
Significant Accounting Policies (Textual) [Abstract]      
Estimated useful lives of assets 20 years    
Minimum [Member]
     
Significant Accounting Policies (Textual) [Abstract]      
Estimated useful lives of assets 5 years