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Subsequent Events - Financing Activity (Details) - USD ($) $ in Thousands | Jul. 22, 2019 | Jul. 11, 2019 | Jul. 10, 2019 | Jun. 30, 2019
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Gladstone Securities |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Face amount of debt |  |  |  | $ 81
Subsequent Event | Rabo AgriFinance, LLC |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Stated interest rate (as percent) |  |  | 4.04% |
Subsequent Event | Maturity 6/1/2029, One-month LIBOR plus 1.750% | Rabo AgriFinance, LLC |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Face amount of debt |  |  | $ 5,514 |
Principal amortization term (in years) |  |  | 25 years |
Subsequent Event | Maturity 6/1/2029, One-month LIBOR plus 1.750% | LIBOR | Rabo AgriFinance, LLC |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Stated interest rate (as percent) |  |  | 1.75% |
Subsequent Event | Maturity 8/1/2044, 5.00%, fixed through June 30, 2029 (variable thereafter) | GreenStone Farm Credit Services |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Face amount of debt |  | $ 1,609 |  |
Principal amortization term (in years) |  | 25 years |  |
Stated interest rate (as percent) |  | 5.00% |  |
Subsequent Event | Maturity 8/1/2044, 5.00%, fixed through June 30, 2029 (variable thereafter) | GreenStone Farm Credit Services |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Face amount of debt |  | $ 3,060 |  |
Principal amortization term (in years) |  | 25 years |  |
Stated interest rate (as percent) |  | 5.00% |  |
Subsequent Event | Maturity 5/1/2044, 4.24%, fixed through July 31, 2026 (variable thereafter) | Farm Credit West, FLCA |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Face amount of debt |  | $ 5,400 |  |
Principal amortization term (in years) |  | 24 years 6 months |  |
Stated interest rate (as percent) |  | 4.24% |  |
Subsequent Event | Maturity 7/1/2027, 5.05%, fixed throughout term | Farm Credit of Central Florida, ACA |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Face amount of debt | $ 31,850 |  |  |
Principal amortization term (in years) | 25 years 2 months 12 days |  |  |
Stated interest rate (as percent) | 5.05% |  |  |
Subsequent Event | Maturity 7/1/2027, 5.05%, fixed throughout term | Farm Credit of Central Florida, ACA |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Face amount of debt | $ 5,850 |  |  |
Stated interest rate (as percent) | 5.05% |  |  |

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