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v3.20.2

Accounts payable, accrued expenses and other liabilities | 6 Months Ended
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Jun. 30, 2020
Payables and Accruals [Abstract] |
Accounts payable, accrued expenses and other liabilities | Accounts payable, accrued expenses and other liabilities Accounts payable, accrued expenses and other liabilities consisted of the following as of June 30, 2020 and December 31, 2019:
| June 30, 2020 |  | December 31, 2019
Deferred revenue | $ | 520,466 |  |  | $ | 389,958 |
Accrued interest | 246,124 |  |  | 255,369 |
Accounts payable and accrued expenses | 220,060 |  |  | 239,086 |
Derivative liabilities (Note 11) | 200,014 |  |  | 97,066 |
Operating lease liabilities | 49,069 |  |  | 51,144 |
| $ | 1,235,733 |  |  | $ | 1,032,623 |

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