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Real Estate and Intangible Assets - Summary of Total Operating Revenues and Earnings Recognized on Properties Acquired (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
Real Estate Properties [Line Items] |  |  |
Rental revenue | $ 3,679,474 | $ 2,622,327 |
Parrish Road [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Rental revenue |  |  | $ 139,073
2015 New Real Estate Activity [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Rental revenue |  | 200,432 |
Earnings |  | $ 104,237 |
2015 New Real Estate Activity [Member] | Espinosa Road [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Acquisition Date |  | Jan. 05, 2015 |
Rental revenue |  | $ 186,216 |
Earnings |  | $ 97,058 |
2015 New Real Estate Activity [Member] | Parrish Road [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Acquisition Date |  | Mar. 10, 2015 |
Rental revenue |  | $ 14,216 |
Earnings |  | $ 7,179 |
2016 New Real Estate Activity [Member] | Gunbarrel Road [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Acquisition Date | Mar. 03, 2016 |  |
Rental revenue | $ 123,999 |  |
Earnings | $ 21,075 |  |

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- Definition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e845-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Acquisition Date -URI http://asc.fasb.org/extlink&oid=6919109 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e848-128460 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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