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v3.19.1

Principal activities and organization - Additional Information (Detail) |  | 12 Months Ended
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Mar. 19, 2018 | Dec. 31, 2018 brand
Accounting Policies [Abstract] |  |
Number of consumer brands |  | 500
Reverse stock split ratio | 0.1333 |

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- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 + Details
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