Quarterly report pursuant to Section 13 or 15(d)

Property Portfolio (Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details)

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Property Portfolio (Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details)
Sep. 30, 2017
USD ($)
Austin Facility [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest $ 40,650,000
Austin Facility [Member] | Land And Site Improvements [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 7,222,455
Austin Facility [Member] | Building And Tenant Improvements [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 29,616,364
Austin Facility [Member] | Above Market Leases [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 245,686
Austin Facility [Member] | In Place Leases [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 1,680,282
Austin Facility [Member] | Leasing costs [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets 1,885,213
Germantown Facility [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest 15,940,250
Germantown Facility [Member] | Land And Site Improvements [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 3,049,683
Germantown Facility [Member] | Building And Tenant Improvements [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 8,385,142
Germantown Facility [Member] | Above Market Leases [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 3,284,388
Germantown Facility [Member] | In Place Leases [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 586,812
Germantown Facility [Member] | Leasing costs [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets 634,225
Lubbock Facility [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest 8,200,000
Lubbock Facility [Member] | Land And Site Improvements [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 1,566,487
Lubbock Facility [Member] | Building And Tenant Improvements [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 5,725,355
Lubbock Facility [Member] | In Place Leases [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 414,189
Lubbock Facility [Member] | Leasing costs [Member]  
Business Acquisition [Line Items]  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets $ 493,969