v2.4.0.6

Summary of significant accounting policies (Tables) | 12 Months Ended
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Dec. 31, 2012
Summary of significant accounting policies |
Schedule of depreciation and amortization computed using the straight-line method over the estimated useful lives of assets |
Computer equipment |  | 2 to 5 years
Software |  | 2 to 5 years
Office equipment |  | 3 to 5 years
Leasehold improvements |  | The shorter of the estimated useful life or the remaining term of the agreements, generally ranging from 3 to 15 years
Schedule of weighted average assumptions used to calculate the grant date fair values of employee stock option grants |
|  | December 31, |
--- | --- | --- | ---
|  | 2012 |  | 2011 |  | 2010 |
Expected term (years) |  |  | 5.9 |  |  | 6.4 |  |  | 6.1 |
Expected volatility |  |  | 48.9 | % |  | 49.8 | % |  | 67.6 | %
Risk-free rate |  |  | 0.9 | % |  | 2.4 | % |  | 2.5 | %
Dividend yield |  |  | 0 | % |  | 0 | % |  | 0 | %
Summary of the entity's revenue by primary revenue source |
|  | Year Ended December 31, |
--- | --- | --- | ---
|  | 2012 |  | 2011 |  | 2010 |
Revenue: |  |  |  |  |  |  |  |  |  |
Retail subscription |  | $ | 32,716 |  | $ | 29,033 |  | $ | 23,561 |
Retail single-use |  |  | 13,429 |  |  | 16,054 |  |  | 17,460 |
Wholesale |  |  | 49,495 |  |  | 43,707 |  |  | 35,134 |
Advertising and other |  |  | 6,866 |  |  | 5,764 |  |  | 4,265 |
Total revenue |  | $ | 102,506 |  | $ | 94,558 |  | $ | 80,420 |

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- Definition Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 37 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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