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Subsequent events - Additional Information (Detail) ¥ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Jan. 31, 2018 USD ($) | Mar. 31, 2018 shares | Nov. 30, 2017 USD ($) | Nov. 30, 2017 CNY (¥)
Henan Tourism Information Co., Ltd., [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Business Combination, Consideration Payable |  |  | $ 1,500,000 | ¥ 9.6
Business Acquisition, Percentage of Voting Interests Acquired |  |  | 80.00% | 80.00%
Subsequent Event [Member] | Web Game Business [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax | $ | $ 1,400,000 |  |  |
Subsequent Event [Member] | Treasury Stock [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Treasury Stock, Shares, Acquired |  | 0 |  |
Subsequent Event [Member] | Restricted shares [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Restricted stock granted |  | 2,815,520 |  |

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- Definition Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721525-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e957-107759 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 + Details
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