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Share-based Compensation - Red Kingdom - Additional Information (Details) - USD ($) |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 15, 2017 | Dec. 15, 2015 | Apr. 03, 2014 | May 31, 2014 | Apr. 30, 2014 | Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Total consideration |  |  |  |  |  | $ 157,654,695
Shares vested |  |  |  |  |  | 2,309,490
Red Kingdom |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Ordinary shares issued |  |  | 8,083,333 |  |  |
Total consideration |  |  | $ 141,971 |  |  |
Shares vested |  |  |  |  |  | 811,667
Red Kingdom | Restricted Shares |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Share issued to secure services |  |  |  | 6,459,167 | 350,000 |
Compensation expenses, deemed service period |  |  |  | 5 years |  |
Shares vested | 811,667 |  |  |  | 1,038,333 |
Unrecognized share-based compensation |  | $ 1,152,600 |  |  |  |
Non-vested restricted shares repurchased | 1,329,999 |  |  |  |  |
Red Kingdom | Restricted Shares | Each yearly anniversary from the date of the agreement |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Vesting percentage |  |  |  | 20.00% |  |
Red Kingdom | Restricted Shares | Each the contractually agreed milestones within each year |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Vesting percentage |  |  |  |  | 20.00% |
Red Kingdom | Senior Management and Certain Advisors |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Ordinary shares issued |  |  | 7,847,500 |  |  |
Red Kingdom | CEO | Restricted Shares |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Shares vested |  | 1,921,000 |  |  |  |

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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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