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Real Estate and Intangible Assets - Additional Information (Detail) |  |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
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Nov. 02, 2015 USD ($) a Farm | Sep. 30, 2015 USD ($) a Agreement Farm | Sep. 10, 2015 USD ($) | Apr. 13, 2015 USD ($) Renewal_Options | Apr. 08, 2015 USD ($) | Feb. 23, 2015 USD ($) Renewal_Options | Feb. 09, 2015 USD ($) | Sep. 30, 2015 USD ($) a Agreement | Mar. 31, 2015 USD ($) | Sep. 30, 2014 USD ($) a | Sep. 30, 2015 USD ($) a Agreement Farm | Sep. 30, 2014 USD ($) a Farm | Dec. 31, 2014 USD ($) Farm
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Farms | Farm |  | 41 |  |  |  |  |  |  |  |  | 41 | 29 |
Number of farms acquired in separate transaction | Farm |  |  |  |  |  |  |  |  |  |  | 9 | 8 |
Number of Farms | Farm |  |  |  |  |  |  |  |  |  |  | 9 |  | 11
Rental income |  |  |  |  |  |  |  | $ 3,080,240 |  | $ 1,771,106 | $ 8,483,023 | $ 4,828,033 |
Property and casualty loss |  |  |  |  |  |  |  |  |  |  |  |  | $ 232,737
Insurance proceeds |  |  |  |  |  |  |  |  |  |  |  |  | $ 495,700
Amortization expense related to lease intangible assets |  |  |  |  |  |  |  | 193,651 |  | 72,493 | 645,448 | 134,502 |
Amortization of acquired above market lease values |  |  |  |  |  |  |  | 4,496 |  | 3,768 | 15,286 | 4,228 |
Accretion of acquired below market lease values |  |  |  |  |  |  |  | 52,591 |  | $ 48,781 | $ 160,324 | $ 89,655 |
Wrote off remaining unamortized above-market lease value |  |  |  |  |  |  |  | $ 27,274 |  |  |  |  |
Percent of total rental revenue |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% |
Area leased | a |  | 14,880 |  |  |  |  |  | 14,880 |  | 7,641 | 14,880 | 7,641 |
Area leased, percentage |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% |
California [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Farms | Farm |  | 18 |  |  |  |  |  |  |  |  | 18 | 11 |
Rental income |  |  |  |  |  |  |  |  |  |  | $ 5,652,357 | $ 3,260,272 |
Percent of total rental revenue |  |  |  |  |  |  |  |  |  |  | 66.60% | 67.50% |
Area leased | a |  | 3,576 |  |  |  |  |  | 3,576 |  | 1,993 | 3,576 | 1,993 |
Area leased, percentage |  | 24.00% |  |  |  |  |  |  |  |  | 24.00% | 26.10% |
Florida [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Farms | Farm |  | 12 |  |  |  |  |  |  |  |  | 12 | 9 |
Rental income |  |  |  |  |  |  |  |  |  |  | $ 1,458,433 | $ 384,861 |
Percent of total rental revenue |  |  |  |  |  |  |  |  |  |  | 17.20% | 8.00% |
Area leased | a |  | 4,401 |  |  |  |  |  | 4,401 |  | 1,304 | 4,401 | 1,304 |
Area leased, percentage |  | 29.60% |  |  |  |  |  |  |  |  | 29.60% | 17.10% |
Oregon [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Farms | Farm |  |  |  |  |  |  |  |  |  |  | 4 | 4 |
Rental income |  |  |  |  |  |  |  |  |  |  | $ 876,244 | $ 775,438 |
Percent of total rental revenue |  |  |  |  |  |  |  |  |  |  | 10.30% | 16.10% |
Area leased | a |  | 2,313 |  |  |  |  |  | 2,313 |  | 2,313 | 2,313 | 2,313 |
Area leased, percentage |  |  |  |  |  |  |  |  |  |  | 15.60% | 30.30% |
Maximum [Member] | Geographic Concentration Risk [Member] | Rental Income [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of individual tenant represented total rental revenue recorded |  |  |  |  |  |  |  |  |  |  | 10.00% |  |
Dole Food Company [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Rental income |  |  |  |  |  |  |  |  |  |  | $ 2,200,000 |  |
Total number of lease agreement with single tenant | Agreement |  | 2 |  |  |  |  |  |  |  |  |  |  |
Percent of total rental revenue |  |  |  |  |  |  |  |  |  |  | 26.10% |  |
Dole Food Company [Member] | Maximum [Member] | Customer Concentration Risk [Member] | Rental Income [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of individual tenant represented total rental revenue recorded |  |  |  |  |  |  |  |  |  |  | 10.00% |  |
Separate Tenant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of total rental revenue |  |  |  |  |  |  |  |  |  |  | 11.20% |  |
Active Purchase and Sale Agreements [Member] | Florida and Georgia [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Area leased | a |  | 1,688 |  |  |  |  |  | 1,688 |  |  | 1,688 |  |
Total Purchase Price |  | $ 7,700,000 |  |  |  |  |  |  |  |  |  |  |
Purchase property expected to close date |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2015 |  |
Number of purchase agreements | Agreement |  | 3 |  |  |  |  |  | 3 |  |  | 3 |  |
Land, Buildings, Improvements and Horticulture [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate depreciation expense |  |  |  |  |  |  |  | $ 595,539 |  | $ 331,430 | $ 1,647,177 | $ 887,939 |
2015 New Real Estate Activity [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Farms | Farm |  |  |  |  |  |  |  |  |  |  | 9 |  |
Rental income |  |  |  |  |  |  |  | 629,000 |  |  | $ 1,086,976 |  |
Amortization expense related to lease intangible assets |  |  |  |  |  |  |  | 20,255 |  | 43,328 |  |  |
Written off intangibles assets |  |  |  |  |  |  |  | 34,155 |  | $ 46,526 |  |  |
Total Purchase Price |  |  |  |  |  |  |  |  |  |  | $ 66,506,980 |  |
Subsequent Event [Member] | Immokalee, FL [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Farms | Farm | 1 |  |  |  |  |  |  |  |  |  |  |  |
Rental income | $ 231,000 |  |  |  |  |  |  |  |  |  |  |  |
Additional extension period of under the option of tenant | 6 years |  |  |  |  |  |  |  |  |  |  |  |
Area leased | a | 692 |  |  |  |  |  |  |  |  |  |  |  |
Total Purchase Price | $ 3,800,000 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Active Purchase and Sale Agreements [Member] | Immokalee, FL [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Area leased | a | 692 |  |  |  |  |  |  |  |  |  |  |  |
Total Purchase Price | $ 3,800,000 |  |  |  |  |  |  |  |  |  |  |  |
Keysville Road [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity date of lease |  |  |  |  |  |  |  |  |  |  | Jun. 30, 2020 |  |
Rental income |  |  |  |  |  |  | $ 73,749 |  |  |  |  |  |
Percentage increase in lease amount |  |  |  |  |  |  | 7.90% |  |  |  |  |  |
Write-off of deferred rent asset balances and rental income related to terminated lease |  |  |  |  |  |  |  |  | $ 32,497 |  |  |  |
Spring Valley [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity date of lease |  |  |  |  |  |  |  |  |  |  | Sep. 30, 2022 |  |
Rental income |  |  |  |  |  | $ 327,904 |  |  |  |  |  |  |
Percentage increase in lease amount |  |  |  |  |  | 32.50% |  |  |  |  |  |  |
Lease renewal term |  |  |  |  |  | 6 years |  |  |  |  |  |  |
Number of options granted to extend the lease | Renewal_Options |  |  |  |  |  | 2 |  |  |  |  |  |  |
Additional extension period of under the option of tenant |  |  |  |  |  | 6 years |  |  |  |  |  |  |
Dalton Lane [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity date of lease |  |  |  |  |  |  |  |  |  |  | Oct. 31, 2020 |  |
Rental income |  |  |  | $ 163,989 |  |  |  |  |  |  |  |  |
Percentage increase in lease amount |  |  |  | 16.80% |  |  |  |  |  |  |  |  |
Lease renewal term |  |  |  | 5 years |  |  |  |  |  |  |  |  |
Number of options granted to extend the lease | Renewal_Options |  |  |  | 1 |  |  |  |  |  |  |  |  |
Additional extension period of under the option of tenant |  |  |  | 5 years |  |  |  |  |  |  |  |  |
McIntosh Road [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity date of lease |  |  |  |  |  |  |  |  |  |  | Jun. 30, 2016 |  |
Rental income |  |  | $ 43,200 |  |  |  |  |  |  |  |  |  |
Wrote off an aggregate amount related to unamortized above-market lease value and deferred rent asset balances |  |  |  |  |  |  |  | 27,274 |  |  |  |  |
West Gonzales [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total repair cost |  |  |  |  |  |  |  |  | 35,648 |  |  |  |
Repair cost, capitalized as real estate |  |  |  |  |  |  |  |  | 25,682 |  |  |  |
Repair and maintenance expense |  |  |  |  |  |  |  |  | $ 9,966 |  |  |  |
West Gonzales [Member] | Property and Casualty Recovery Income, Net [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance proceeds |  |  |  |  |  |  |  | $ 76,423 |  |  | $ 97,232 |  |
Santa Clara Avenue [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity date of lease |  |  |  |  |  |  |  |  |  |  | Jul. 31, 2017 |  |
Rental income |  |  |  |  | $ 1,302,783 |  |  |  |  |  |  |  |
Percentage increase in lease amount |  |  |  |  | 5.80% |  |  |  |  |  |  |  |
Lease renewal term |  |  |  |  | 2 years |  |  |  |  |  |  |  |

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