Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

Name:	us-gaap_TreasuryStockShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Additional information: condensed financial statements of the Company - Schedule of Condensed Balance Sheets (Parenthetical) (Detail)	Dec. 31, 2014	Apr. 30, 2014	Dec. 31, 2013	Nov. 30, 2013
Consolidated Balance Sheet Statements Captions [Line Items]
Treasury stock, shares	30,274,602us-gaap_TreasuryStockShares	14,195,412us-gaap_TreasuryStockShares	9,073,732us-gaap_TreasuryStockShares	9,073,732us-gaap_TreasuryStockShares
Xunlei Limited [Member]
Consolidated Balance Sheet Statements Captions [Line Items]
Treasury stock, shares	30,274,602		9,073,732