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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 | 9 Months Ended
--- | --- | --- | ---
Apr. 05, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Real Estate Properties [Line Items] |  |  |  |  |
Rental revenue |  | $ 4,467,217 | $ 3,080,240 | $ 12,388,303 | $ 8,483,023
Parrish Road [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Rental revenue | $ 139,073 |  |  |  |
2015 New Real Estate Activity [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Costs, Period Cost |  |  | 75,293 |  | 413,374
Rental revenue |  |  | 629,000 |  | 1,086,976
Earnings |  |  | 126,226 |  | $ (174,667)
2015 New Real Estate Activity [Member] | Espinosa Road [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  |  | Jan. 05, 2015
Rental revenue |  |  | 194,586 |  | $ 575,387
Earnings |  |  | (2,922) |  | $ (53,281)
2015 New Real Estate Activity [Member] | Parrish Road [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  |  | Mar. 10, 2015
Rental revenue |  |  | 62,958 |  | $ 140,133
Earnings |  |  | (10,175) |  | $ (106,362)
2015 New Real Estate Activity [Member] | Immokalee Exchange [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  |  | Jun. 25, 2015
Rental revenue |  |  | 240,026 |  | $ 240,026
Earnings |  |  | 94,302 |  | $ (60,045)
2015 New Real Estate Activity [Member] | Holt County [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  |  | Aug. 20, 2015
Rental revenue |  |  | 33,500 |  | $ 33,500
Earnings |  |  | (6,075) |  | $ (6,075)
2015 New Real Estate Activity [Member] | Rock County [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  |  | Aug. 20, 2015
Rental revenue |  |  | 33,500 |  | $ 33,500
Earnings |  |  | (7,927) |  | $ (7,927)
2015 New Real Estate Activity [Member] | Bear Mountain [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  |  | Sep. 03, 2015
Rental revenue |  |  | 64,430 |  | $ 64,430
Earnings |  |  | $ 59,023 |  | $ 59,023
2016 New Real Estate Activity [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Costs, Period Cost |  | 128,161 |  | 229,476 |
Rental revenue |  | 769,171 |  | 1,474,688 |
Earnings |  | (41,908) |  | $ (196,727) |
2016 New Real Estate Activity [Member] | Gunbarrel Road [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  | Mar. 03, 2016 |
Rental revenue |  | 397,654 |  | $ 919,306 |
Earnings |  | (28,515) |  | $ (180,491) |
2016 New Real Estate Activity [Member] | Calaveras Avenue [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  | Apr. 05, 2016 |
Rental revenue |  | 193,375 |  | $ 377,240 |
Earnings |  | (8,478) |  | $ (11,321) |
2016 New Real Estate Activity [Member] | Orange Avenue [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  | Jul. 01, 2016 |
Rental revenue |  | 72,793 |  | $ 72,793 |
Earnings |  | 15,884 |  | $ 15,884 |
2016 New Real Estate Activity [Member] | Lithia Road [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  | Aug. 11, 2016 |
Rental revenue |  | 13,601 |  | $ 13,601 |
Earnings |  | (28,607) |  | $ (28,607) |
2016 New Real Estate Activity [Member] | Baca County [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  | Sep. 01, 2016 |
Rental revenue |  | 31,978 |  | $ 31,978 |
Earnings |  | 30,799 |  | $ 30,799 |
2016 New Real Estate Activity [Member] | Diego Ranch [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  | Sep. 14, 2016 |
Rental revenue |  | 31,056 |  | $ 31,056 |
Earnings |  | (10,070) |  | $ (10,070) |
2016 New Real Estate Activity [Member] | Nevada Ranch [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  |  |  | Sep. 14, 2016 |
Rental revenue |  | 28,714 |  | $ 28,714 |
Earnings |  | $ (12,921) |  | $ (12,921) |

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