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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2019
Revenue from Contract with Customer [Abstract] |
Composition of Revenue | Revenue is comprised of the following:
|  | Year ended December 31, |
|  | 2018 |  |  | 2019 |
Commercial advertising |  | $ | 222,763,906 |  |  | $ | 223,832,448 |
Digital advertising |  |  | 15,485,353 |  |  |  | 20,297,476 |
Other revenue |  |  | 19,245,340 |  |  |  | 17,424,190 |
|  | $ | 257,494,599 |  |  | $ | 261,554,114 |
Deferred Revenue |
|  | December 31, 2018 |  |  | December 31, 2019 |
Deferred revenue |  | $ | 1,868,223 |  |  | $ | 3,639,077 |
Trade Sale Revenue |
|  | December 31, 2018 |  |  | December 31, 2019 |
Trade sales receivable |  | $ | 1,606,283 |  |  | $ | 1,691,295 |
Trade sales payable |  |  | 1,250,454 |  |  |  | 2,180,783 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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