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Accrued maintenance liability (Tables) | 6 Months Ended
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Jun. 30, 2020
Accrued Maintenance Liability [Abstract] |
Schedule of movements in accrued maintenance liability | Movements in accrued maintenance liability during the six months ended June 30, 2020 and 2019 were as follows:
| Six Months Ended June 30, |  |
| 2020 |  | 2019
Accrued maintenance liability at beginning of period | $ | 2,190,159 |  |  | $ | 2,237,494 |
Maintenance payments received | 194,779 |  |  | 358,694 |
Maintenance payments returned | (208,630) |  |  | (206,456) |
Release to income upon sale | (86,592) |  |  | (64,066) |
Release to income other than upon sale | (224,207) |  |  | (87,061) |
Lessor contribution, top ups and other | 65,365 |  |  | 4,148 |
Accrued maintenance liability at end of period | $ | 1,930,874 |  |  | $ | 2,242,753 |

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- Definition Schedule Of Movements In Accrued Maintenance Liability [Table Text Block] + References No definition available. + Details
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