Quarterly report pursuant to Section 13 or 15(d)

SCHEDULE OF PORTFOLIO INVESTMENTS (Parenthetical) (Details)

v3.5.0.2
SCHEDULE OF PORTFOLIO INVESTMENTS (Parenthetical) (Details)
12 Months Ended
Dec. 31, 2015
USD ($)
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 100.00%
Investment, cost $ 33,723,765
Investment at cost, percentage 100.35%
Liabilities in excess of other assets, percentage (0.35%)
7.75% Series A Preferred Stock | Industrial Real Estate Investment Trusts | CubeSmart  
Schedule Of Investments [Line Items]  
Preferred stock dividend percentage 7.75%
Self Storage Properties  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 81.82%
Investment, cost $ 27,725,000
Other | RMR Asia Pacific Fund Fractional Shares  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 0.00%
Investment, cost $ 0
Other | SSG Operations LLC  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 0.06%
Investment, cost $ 24,573
Real Estate Investment Trusts | 8.25% Series A Preferred Stock | Retail Real Estate Investment Trusts | Pennsylvania Real Estate Investment Trust  
Schedule Of Investments [Line Items]  
Preferred stock dividend percentage 8.25%
Real Estate Investment Trusts | 6.625% Series F Preferred Stock | Retail Real Estate Investment Trusts | Realty Income Corp  
Schedule Of Investments [Line Items]  
Preferred stock dividend percentage 6.625%
Wholly Owned Subsidiaries  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 81.88%
Investment, cost $ 27,749,573
Real Estate Owned  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 81.82%
Common stock, par value  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 7.34%
Investment, cost $ 1,360,102
Common stock, par value | Real Estate Investment Trusts  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 7.34%
Common stock, par value | Real Estate Investment Trusts | Diversified Real Estate Investment Trusts  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 1.58%
Common stock, par value | Real Estate Investment Trusts | Industrial Real Estate Investment Trusts  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 5.76%
Preferred Stocks  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 2.79%
Investment, cost $ 1,087,753
Preferred Stocks | Real Estate Investment Trusts  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 2.79%
Preferred Stocks | Real Estate Investment Trusts | Industrial Real Estate Investment Trusts  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 0.93%
Preferred Stocks | Real Estate Investment Trusts | Retail Real Estate Investment Trusts  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 1.86%
Short-term Investments  
Schedule Of Investments [Line Items]  
Investment net of asset, percentage 8.34%
Short-term Investments | S Sg A Money Market Fund  
Schedule Of Investments [Line Items]  
Investment, cost $ 3,526,337
Annualized yield, period 7 days
Annualized yield, percentage 0.01%