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Organization and principal activities (Schedule of Details of Subsidiaries, VIEs and VIE's Subsidiary) (Details)	12 Months Ended
	Dec. 31, 2015
100 Online [Member]
Subsidiaries, VIEs and VIE's subsidiary [Line Items]
% of direct or indirect economic ownership	100.00%	[1]
Xingxue [Member]
Subsidiaries, VIEs and VIE's subsidiary [Line Items]
% of direct or indirect economic ownership	76.90%
Beifu [Member]
Subsidiaries, VIEs and VIE's subsidiary [Line Items]
% of direct or indirect economic ownership	70.00%
Shanghai Yilian Equity Investment Partnership LP [Member]
Subsidiaries, VIEs and VIE's subsidiary [Line Items]
% of direct or indirect economic ownership	93.50%
Guangzhou Huaduo [Member]
Subsidiaries, VIEs and VIE's subsidiary [Line Items]
% of direct or indirect economic ownership	100.00%
Duowan Entertainment Corporation [Member]
Subsidiaries, VIEs and VIE's subsidiary [Line Items]
% of direct or indirect economic ownership	100.00%
Huanju Shidai Technology Beijing Company Limited [Member]
Subsidiaries, VIEs and VIE's subsidiary [Line Items]
% of direct or indirect economic ownership	100.00%
Zhuhai Duowan or Guangzhou Duowan [Member]
Subsidiaries, VIEs and VIE's subsidiary [Line Items]
% of direct or indirect economic ownership	100.00%
Guangzhou Huanju Shidai [Member]
Subsidiaries, VIEs and VIE's subsidiary [Line Items]
% of direct or indirect economic ownership	100.00%
Engage Capital Partners I LP [Member]
Subsidiaries, VIEs and VIE's subsidiary [Line Items]
% of direct or indirect economic ownership	93.50%
[1] *100 Online Education Technology (Beijing) Co.,Ltd. (“100 Online”), formerly known as Zhengrenqiang and His Partners Education Technology (Beijing) Co., Ltd. (“Zhengrenqiang”).

X

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

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- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=52262685&loc=SL6759159-111685

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