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Commitments and Contingencies - Additional Information (Details) |  | 1 Months Ended | 3 Months Ended | 11 Months Ended | 20 Months Ended | 22 Months Ended | 44 Months Ended | 89 Months Ended |  |  |
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Jun. 01, 2017 lease farm | Jul. 31, 2018 USD ($) a farm | May 31, 2018 USD ($) | Aug. 31, 2017 USD ($) a | Jun. 30, 2017 USD ($) farm | Mar. 31, 2019 USD ($) a | Mar. 31, 2018 USD ($) a | Mar. 31, 2019 USD ($) a | Mar. 31, 2019 USD ($) a | Mar. 31, 2019 USD ($) a | Dec. 31, 2020 USD ($) | Sep. 30, 2024 | Jan. 01, 2019 USD ($) | Dec. 31, 2018 USD ($) a | May 31, 2017 farm
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cost |  |  |  |  |  | $ 3,063,000 | $ 4,478,000 |  |  |  |  |  |  |  |
Number of farms acquired | farm | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 73,900 | 63,351 | 73,900 | 73,900 | 73,900 |  |  |  |  |
Number of Leases | lease | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating lease right-of-use assets |  |  |  |  |  | $ 208,000 |  | $ 208,000 | $ 208,000 | $ 208,000 |  |  |  |  |
Operating lease liabilities |  |  |  |  |  | $ 167,000 |  | $ 167,000 | $ 167,000 | $ 167,000 |  |  |  | $ 232,000 |
Weighted-average discount rate |  |  |  |  |  | 4.20% |  | 4.20% | 4.20% | 4.20% |  |  |  |  |
Lease expense |  |  |  |  |  | $ 12,000 | $ 12,000 |  |  |  |  |  |  |  |
2018 New Real Estate Activity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate property (in acres) | a |  |  |  |  |  |  |  |  |  |  |  |  |  | 337 |
Oregon |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of farms in lease amendment | farm |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1
Accrued liabilities related to lease |  |  |  |  |  | $ 1,023,000 |  | $ 1,023,000 | $ 1,023,000 | $ 1,023,000 |  |  |  |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 418 |  | 418 | 418 | 418 |  |  |  | 2,313 |
Oregon | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cost |  |  |  |  |  |  |  |  |  |  | $ 1,800,000 |  |  |  |
Annual rent escalation (as percent) |  |  |  |  |  |  |  |  |  |  |  | 6.50% |  |  |
Oregon | 2018 New Real Estate Activity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cost |  |  | $ 250,000 |  |  |  |  |  |  |  |  |  |  |  |
Expended or accrued for capital improvements |  |  |  |  |  |  |  | $ 18,000 |  |  |  |  |  |  |
North Carolina |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cost |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |
Number of farms acquired | farm |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Expended or accrued for capital improvements |  |  |  |  |  |  |  |  |  | $ 166,000 |  |  |  |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 310 |  | 310 | 310 | 310 |  |  |  | 310 |
Florida |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of farms acquired | farm |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 17,184 |  | 17,184 | 17,184 | 17,184 |  |  |  | 11,006 |
Collier and Hendry, FL | 2018 New Real Estate Activity | Owl Hammock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cost |  | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate property (in acres) | a |  | 5,630 |  |  |  |  |  |  |  |  |  |  |  |  |
California |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rent escalation (as percent) |  |  |  | 6.00% |  |  |  |  |  |  |  |  |  |  |
Expended or accrued for capital improvements |  |  |  |  |  |  |  |  | $ 1,600,000 |  |  |  |  |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 10,147 |  | 10,147 | 10,147 | 10,147 |  |  |  | 8,241 |
Santa Barbara, CA | 2017 New Real Estate Activity | Cat Canyon Road |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cost |  |  |  | $ 4,000,000 |  |  |  |  |  |  |  |  |  |  |
Area of real estate property (in acres) | a |  |  |  | 361 |  |  |  |  |  |  |  |  |  |  |
ASU 2016-02 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating lease right-of-use assets |  |  |  |  |  |  |  |  |  |  |  |  | $ 218,000 |  |
Operating lease liabilities |  |  |  |  |  |  |  |  |  |  |  |  | $ 213,000 |  |
Minimum | ASU 2016-02 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average discount rate |  |  |  |  |  |  |  |  |  |  |  |  | 2.47% |  |
Maximum | ASU 2016-02 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average discount rate |  |  |  |  |  |  |  |  |  |  |  |  | 2.53% |  |

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