Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Fair Value of Assets Acquired and Liabilities Assumed Related to Property Acquired (Detail)

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Real Estate and Intangible Assets - Fair Value of Assets Acquired and Liabilities Assumed Related to Property Acquired (Detail) - USD ($)
Mar. 31, 2016
Mar. 31, 2015
2015 New Real Estate Activity [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   $ 20,818,780
2015 New Real Estate Activity [Member] | Espinosa Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   16,905,500
2015 New Real Estate Activity [Member] | Parrish Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   3,913,280
2015 New Real Estate Activity [Member] | Irrigation System [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   1,797,252
2015 New Real Estate Activity [Member] | Irrigation System [Member] | Espinosa Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   497,401
2015 New Real Estate Activity [Member] | Irrigation System [Member] | Parrish Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   1,299,851
2015 New Real Estate Activity [Member] | In-place Leases [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   300,877
2015 New Real Estate Activity [Member] | In-place Leases [Member] | Espinosa Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   246,472
2015 New Real Estate Activity [Member] | In-place Leases [Member] | Parrish Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   54,405
2015 New Real Estate Activity [Member] | Leasing Costs [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   121,344
2015 New Real Estate Activity [Member] | Leasing Costs [Member] | Espinosa Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   43,895
2015 New Real Estate Activity [Member] | Leasing Costs [Member] | Parrish Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   77,449
2015 New Real Estate Activity [Member] | Customer Relationships [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   216,680
2015 New Real Estate Activity [Member] | Customer Relationships [Member] | Espinosa Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   180,788
2015 New Real Estate Activity [Member] | Customer Relationships [Member] | Parrish Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   35,892
2016 New Real Estate Activity [Member] | Gunbarrel Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price $ 25,735,815  
2016 New Real Estate Activity [Member] | Irrigation System [Member] | Gunbarrel Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 2,830,738  
2016 New Real Estate Activity [Member] | In-place Leases [Member] | Gunbarrel Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 381,977  
2016 New Real Estate Activity [Member] | Leasing Costs [Member] | Gunbarrel Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 249,893  
2016 New Real Estate Activity [Member] | Other Improvements [Member] | Gunbarrel Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 2,079,102  
Land and Land Improvements [Member] | 2015 New Real Estate Activity [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   18,255,530
Land and Land Improvements [Member] | 2015 New Real Estate Activity [Member] | Espinosa Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   15,852,466
Land and Land Improvements [Member] | 2015 New Real Estate Activity [Member] | Parrish Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   2,403,064
Land and Land Improvements [Member] | 2016 New Real Estate Activity [Member] | Gunbarrel Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 16,755,814  
Buildings [Member] | 2015 New Real Estate Activity [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   127,097
Buildings [Member] | 2015 New Real Estate Activity [Member] | Espinosa Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   84,478
Buildings [Member] | 2015 New Real Estate Activity [Member] | Parrish Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price   $ 42,619
Buildings [Member] | 2016 New Real Estate Activity [Member] | Gunbarrel Road [Member]    
Business Acquisition [Line Items]    
Total Purchase Price $ 3,438,291