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Commitments and Contingencies - Additional Information (Details) $ in Thousands |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 01, 2017 lease farm | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Jan. 01, 2019 USD ($) | Dec. 31, 2018 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of farms acquired | farm | 2 |  |  |  |  |  |
Number of Leases | lease | 2 |  |  |  |  |  |
Operating lease right-of-use assets |  | $ 188 |  | $ 188 |  |  |
Operating lease liabilities |  | $ 171 |  | $ 171 |  |  | $ 232
Weighted-average discount rate |  | 4.20% |  | 4.20% |  |  |
Lease expense |  | $ 12 | $ 12 | $ 39 | $ 36 |  |
ASU 2016-02 |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Operating lease right-of-use assets |  |  |  |  |  | $ 218 |
Operating lease liabilities |  |  |  |  |  | $ 213 |
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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