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Real Estate and Intangible Assets - Pro-Forma Condensed Consolidated Statements of Operations as Properties Acquired (Detail) - USD ($) | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Operating Data: |  |
Total operating revenue | $ 3,761,746 | $ 3,080,488
Net income attributable to the company | $ 156,241 | $ 37,637
Share and Per-share Data: |  |
Earnings per share of common stock - basic and diluted | $ 0.01 | $ 0.00
Weighted-average common shares outstanding - basic and diluted | 10,738,820 | 7,880,328

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