Annual report pursuant to Section 13 and 15(d)

Agreements (Details Textual)

v2.4.0.6
Agreements (Details Textual) (USD $)
 12 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Agreements (Textual) [Abstract]    
Annually rate of fee percentage on the value of company's average daily managed assets 0.04%  
Monthly fee payable to accounting services provider $ 24,000  
Company net asset, year one 50,000,000  
Annual rate of monthly fee payable to accounting services provider on company assets, year one 0.0125%  
Company net asset, year two 200,000,000  
Annual rate of monthly fee payable to accounting services provider on company assets, year two 0.0075%  
Company net asset, year three 250,000,000  
Annual rate of monthly fee payable to accounting services provider on company assets, year three 0.0025%  
Minimum [Member]
    
Agreements (Textual) [Abstract]    
Administrator minimum annual fee $ 30,000  
Corridor Infra Trust Management [Member]
    
Agreements (Textual) [Abstract]    
Management agreement expiration date Jun. 30, 2012  
Quarterly management fee percentage on the value of company's average monthly managed assets   0.25%
Annual management fee percentage on the value of company's average monthly managed assets   1.00%
Quarterly incentive fee on increase in distributions paid   10.00%
Threshold distribution per quarter   $ 0.125