Annual report pursuant to Section 13 and 15(d)

Management and Advisory Agreements (Details)

v3.3.1.900
Management and Advisory Agreements (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Nov. 30, 2011
Corridor Infra Trust Management [Member]        
Agreements (Textual) [Abstract]        
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
New Management Agreement [Member]        
Agreements (Textual) [Abstract]        
Incentive fees waived $ 133,194      
Incentive fees 278,619      
Incentive fee paid 145,425      
Management fees $ 5,700,000 $ 3,500,000 $ 2,600,000  
Administrative Agreement [Member]        
Agreements (Textual) [Abstract]        
Annually rate of fee percentage on the value of company's average daily managed assets 0.04%      
Administrator minimum annual fee $ 30,000      
Administrative Agreement [Member] | Corridor Infra Trust Management [Member]        
Agreements (Textual) [Abstract]        
Management fees $ 224,000 $ 134,000 $ 112,000