v2.4.0.6

Summary of significant accounting policies (Details 6) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 item | Dec. 31, 2011 | Dec. 31, 2010
Segment and geographical information |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments |  |  |  |  |  |  |  |  | 1 |  |
Revenue | $ 28,000 | $ 26,017 | $ 24,302 | $ 24,187 | $ 25,899 | $ 24,688 | $ 22,943 | $ 21,028 | $ 102,506 | $ 94,558 | $ 80,420
Retail subscription |  |  |  |  |  |  |  |  |  |  |
Segment and geographical information |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 32,716 | 29,033 | 23,561
Retail single-use |  |  |  |  |  |  |  |  |  |  |
Segment and geographical information |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 13,429 | 16,054 | 17,460
Wholesale |  |  |  |  |  |  |  |  |  |  |
Segment and geographical information |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 49,495 | 43,707 | 35,134
Advertising and other |  |  |  |  |  |  |  |  |  |  |
Segment and geographical information |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 6,866 | $ 5,764 | $ 4,265

X
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X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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