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Commitments and contingencies (Tables) | 6 Months Ended
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Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract] |
Schedule of movements in prepayments on flight equipment | Movements in prepayments on flight equipment during the six months ended June 30, 2021 and 2020 were as follows:
| Six Months Ended June 30,
| 2021 |  | 2020
Prepayments on flight equipment at beginning of period | $ | 2,111,659 |  |  | $ | 2,954,478 |
Prepayments during the period, net | 88,063 |  |  | 685,051 |
Interest paid and capitalized during the period | 10,331 |  |  | 31,830 |
Prepayments and capitalized interest applied to the purchase of flight equipment | (338,237) |  |  | (301,263) |
Prepayments on flight equipment at end of period | $ | 1,871,816 |  |  | $ | 3,370,096 |

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