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Subsequent Events - Additional Information (Detail) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Nov. 02, 2015 USD ($) a Farm | Oct. 05, 2015 USD ($) | Sep. 30, 2015 a Agreement shares | Nov. 03, 2015 USD ($) $ / shares shares | Mar. 31, 2016 USD ($) a | Dec. 31, 2015 USD ($) a | Sep. 30, 2015 USD ($) a Agreement | Sep. 30, 2014 USD ($) a | Sep. 30, 2015 USD ($) a Agreement Farm | Sep. 30, 2014 USD ($) a | Dec. 31, 2014 Farm
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of Farms | Farm |  |  |  |  |  |  |  |  | 9 |  | 11
Total Acres | a |  |  | 14,880 |  |  |  | 14,880 | 7,641 | 14,880 | 7,641 |
Rental income |  |  |  |  |  |  | $ 3,080,240 | $ 1,771,106 | $ 8,483,023 | $ 4,828,033 |
At-the-Market Program [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sale of common stock sold under sale agreement | shares |  |  | 0 |  |  |  |  |  |  |  |
Subsequent Event [Member] | At-the-Market Program [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sale of common stock sold under sale agreement | shares |  |  |  | 2,100 |  |  |  |  |  |  |
Average sales price of common stock sold | $ / shares |  |  |  | $ 9.57 |  |  |  |  |  |  |
Gross proceeds from issuance of common stock |  |  |  | $ 20,000 |  |  |  |  |  |  |
Farm Credit Loans [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate notes payable | $ 3,800,000 |  |  |  |  |  |  |  |  |  |
Farm Credit Loans [Member] | Mortgage Note [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maturity Date |  |  |  |  |  |  |  |  | Oct. 01, 2040 |  |
Fixed interest rate |  |  | 3.86% |  |  |  | 3.86% |  | 3.86% |  |
Farm Credit Loans [Member] | Mortgage Note [Member] | Through November 30, 2021 [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit notes payable interest rate there after, Description |  |  |  |  |  |  |  |  | One-month LIBOR, plus 2.875% |  |
Percentage added to LIBOR |  |  |  |  |  |  |  |  | 2.875% |  |
Farm Credit Loans [Member] | Mortgage Note [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate notes payable | 2,300,000 |  |  |  |  |  |  |  |  |  |
Farm Credit Loans [Member] | Bridge Loan [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maturity Date |  |  |  |  |  |  |  |  | Oct. 01, 2016 |  |
Credit notes payable interest rate there after, Description |  |  |  |  |  |  |  |  | One-month LIBOR, plus 3.000% |  |
Percentage added to LIBOR |  |  |  |  |  |  |  |  | 3.00% |  |
Farm Credit Loans [Member] | Bridge Loan [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate notes payable | $ 1,500,000 |  |  |  |  |  |  |  |  |  |
East Shelton [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Additional annualized Straight-line Rent |  | $ 35,000 |  |  |  |  |  |  |  |  |
Arizona and Colorado [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Acres | a |  |  | 3,160 |  |  |  | 3,160 |  | 3,160 |  |
Total Purchase Price |  |  |  |  |  |  |  |  | $ 12,800,000 |  |
Number of purchase agreements | Agreement |  |  | 2 |  |  |  | 2 |  | 2 |  |
Arizona and Colorado [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Acres | a |  |  |  |  | 1,920 | 1,240 |  |  |  |  |
Total Purchase Price |  |  |  |  | $ 7,100,000 | $ 5,700,000 |  |  |  |  |
Immokalee, FL [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of Farms | Farm | 1 |  |  |  |  |  |  |  |  |  |
Total Acres | a | 692 |  |  |  |  |  |  |  |  |  |
Total Purchase Price | $ 3,800,000 |  |  |  |  |  |  |  |  |  |
Lease Term | 6 years |  |  |  |  |  |  |  |  |  |
Additional extension period of under the option of tenant | 6 years |  |  |  |  |  |  |  |  |  |
Rental income | $ 231,000 |  |  |  |  |  |  |  |  |  |

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