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Real Estate Assets and Lease Intangibles (Narratives) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Real Estate and Accumulated Depreciation Disclosure [Abstract]    
Finite Lived Intangible Asset Useful Life 19 years  
Business Acquisition [Line Items]    
Number Of Real Estate Properties   7
Promissory note paid $ 92,480,363 $ 65,929,797
Rentable square feet 80,800  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Mortgage notes payable retired 1,500,000  
Model Home Properties Disposed [Member]
    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Proceeds from Sale of Real Estate 8,900,000 8,500,000
Gain Loss On Sale Of Properties 260,360  
Mortgage notes payable retired   5,700,000
Model Home One In Texas [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties 380,000  
Cash Payment for the properties acquired 150,000  
Promissory note paid 230,000  
Model Home Nineteen in California [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties 8,200,000  
Cash Payment for the properties acquired 3,700,000  
Promissory note paid 4,500,000  
Shoreline Medical Building [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties 6,400,000  
Cash Payment for the properties acquired 2,300,000  
Rentable square feet 15,335  
Debt Instrument, Interest Rate, Stated Percentage 5.10%  
Area of Land 38,600  
Model Home in New Jersey and Pennsylvania [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties 5,000,000  
Cash Payment for the properties acquired 2,000,000  
Promissory note paid 3,000,000  
Number of Units in Real Estate Property 14  
Model Home Two In Texas [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties   450,000
Cash Payment for the properties acquired   230,000
Promissory note paid   220,000
Model Home Five California [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties   1,500,000
Cash Payment for the properties acquired   750,000
Promissory note paid   750,000
Model Home Four South Carolina [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties   1,000,000
Cash Payment for the properties acquired   500,000
Promissory note paid   500,000
Sparky's Rialto Self-Storage [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties   400,000
Cash Payment for the properties acquired   400,000
Area of Land   3
Dakota Bank Buildings [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties   9,600,000
Cash Payment for the properties acquired   3,875,000
Rentable square feet   120,000
Interest rate floor   5.75%
Interest rate ceiling   9.75%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate   3.00%
Model Home Three In Texas [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties   600,000
Cash Payment for the properties acquired   300,000
Promissory note paid   300,000
Model Home Eight [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties   1,900,000
Cash Payment for the properties acquired   1,000,000
Promissory note paid   900,000
Yucca Valley Retail Center [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties 1,100,000 6,800,000
Cash Payment for the properties acquired 1,100,000 3,500,000
Promissory note paid   3,300,000
Rentable square feet 17,600 86,000
Debt Instrument, Interest Rate, Stated Percentage   5.62%
Occupancy Rate   93.00%
Sparky's Sunrise Self-Storage [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties   2,200,000
Cash Payment for the properties acquired   2,200,000
Rentable square feet   93,851
Number of Units in Real Estate Property   737
Area of Land   4.93
Port of San Diego Complex [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties   14,500,000
Cash Payment for the properties acquired   2,900,000
Promissory note paid   9,500,000
Rentable square feet   146,700
Area of Land   6.13
PaymentsToAcquirePartnersInterestInRealEstatePartnershipNetOfCashAcquired   500,000
MinorityInterestOwnershipPercentageByNoncontrollingOwners   25.00%
Equity Method Investment, Ownership Percentage   75.00%
Occupancy Rate   51.70%
Preferred Stock, Shares Issued   1,649.266
Model Home In South Carolina [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties   300,000
Cash Payment for the properties acquired   100,000
The Presidio [Member]
    
Business Acquisition [Line Items]    
Purchase Price for the properties 7,300,000  
Cash Payment for the properties acquired $ 1,600,000  
Debt Instrument, Interest Rate, Stated Percentage 5.60%