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Real Estate and Lease Intangibles - Summary Information of Farms (Narrative) (Detail) |  | 12 Months Ended
--- | --- | ---
Feb. 08, 2016 | Dec. 31, 2016 USD ($) lease shares | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Real Estate Properties [Line Items] |  |  |  |  |
Deferred financing costs related to mortgage notes and bonds payable |  |  |  | $ 0 |
Payments of legal costs |  |  | $ 271,791 | 1,482,029 | $ 950,965
Credits to fees from Adviser | [1] |  | 0 | 320,905 | $ 0
2016 New Real Estate Activity |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Direct leasing costs in connection with acquisitions |  |  | 206,210 |  |
2016 New Real Estate Activity | New Tenant Lease Agreement |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Direct leasing costs in connection with acquisitions |  |  | $ 9,520 |  |
2015 New Real Estate Activity |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Direct leasing costs in connection with acquisitions |  |  |  | 388,594 |
Direct leasing costs |  |  |  | 11,825 |
Trapnell Road | Plant City, FL |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Maturity date of lease |  |  | Jun. 30, 2017 |  |
Trapnell Road | Plant City, FL | Agricultural Sector |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of leases | lease |  |  | 3 |  |
Trapnell Road | Plant City, FL | Commercial Sector |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of leases | lease |  |  | 1 |  |
Maturity date of lease |  |  | Jun. 30, 2018 |  |
McIntosh Road |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Maturity date of lease |  | Jun. 30, 2019 |  |  |
McIntosh Road | Dover, FL |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of leases | lease |  |  | 2 |  |
Maturity date of lease |  |  | Jun. 30, 2017 |  |
McIntosh Road | Dover, FL | Lease Two |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Maturity date of lease |  |  | Jun. 30, 2019 |  |
McIntosh Road | Dover, FL | Agricultural Sector |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Maturity date of lease |  |  | Jun. 30, 2017 |  |
Gunbarrel Road | Alamosa, CO |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of leases | lease |  |  | 2 |  |
Maturity date of lease |  |  | Feb. 28, 2021 |  |
Gunbarrel Road | Alamosa, CO | 2016 New Real Estate Activity |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of shares issued (in shares) | shares |  |  | 745,879 |  |
Aggregate fair value |  |  | $ 6,500,000 |  |
Payments of legal costs |  |  | $ 25,500 |  |
Gunbarrel Road | Alamosa, CO | Land |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Maturity date of lease |  |  | Feb. 28, 2021 |  |
Gunbarrel Road | Alamosa, CO | Facility |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Maturity date of lease |  |  | Jun. 30, 2021 |  |
Baca County | Edler, CO |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Maturity date of lease |  |  | Dec. 31, 2020 |  |
Baca County | Edler, CO | 2016 New Real Estate Activity |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of shares issued (in shares) | shares |  |  | 125,677 |  |
Aggregate fair value |  |  | $ 1,500,000 |  |
Payments of legal costs |  |  | $ 8,235 |  |
Nevada Ranch | Merced, CA |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Maturity date of lease |  |  | Nov. 15, 2019 |  |
Nevada Ranch | Merced, CA | 2016 New Real Estate Activity |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of shares issued (in shares) | shares |  |  | 343,750 |  |
Aggregate fair value |  |  | $ 3,900,000 |  |
Payments of legal costs |  |  | $ 21,710 |  |
Horse Creek | Baca, CO |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Maturity date of lease |  |  | Dec. 31, 2020 |  |
Horse Creek | Baca, CO | 2016 New Real Estate Activity |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of shares issued (in shares) | shares |  |  | 233,952 |  |
Aggregate fair value |  |  | $ 2,600,000 |  |
Payments of legal costs |  |  | 7,675 |  |
Long-term mortgage notes and bonds payable |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Deferred financing costs related to mortgage notes and bonds payable |  |  | $ 1,412,017 | $ 1,054,222 |
[1] | Refer to Note 6, “Related-Party Transactions,” for additional information.

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