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Other income | 6 Months Ended
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Jun. 30, 2020
Component of Operating Income [Abstract] |
Other income | Other income Other income consisted of the following for the three and six months ended June 30, 2020 and 2019:
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Management fees | $ | 1,178 |  |  | $ | 2,397 |  |  | $ | 5,816 |  |  | $ | 5,807 |
Interest and other income | 13,749 |  |  | 14,559 |  |  | 23,843 |  |  | 32,542 |
| $ | 14,927 |  |  | $ | 16,956 |  |  | $ | 29,659 |  |  | $ | 38,349 |

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- Definition The entire disclosure for interest and other income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 610 -URI http://asc.fasb.org/topic&trid=49130413 + Details
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