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v3.19.3.a.u2

Accounts payable, accrued expenses and other liabilities | 12 Months Ended
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Dec. 31, 2019
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 December 31, 2019 and 2018:
| As of December 31,
| 2019 |  | 2018
Deferred revenue | $ | 389,958 |  |  | $ | 421,542 |
Accrued interest | 255,369 |  |  | 262,559 |
Accounts payable and accrued expenses | 239,086 |  |  | 296,523 |
Derivative liabilities (Note 11) | 97,066 |  |  | 29,321 |
Operating lease liabilities (Note 16) | 51,144 |  |  | — |
| $ | 1,032,623 |  |  | $ | 1,009,945 |

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