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The Company and Summary of Significant Accounting Policies - Concentrations of Risk (Details) (Customer Concentration Risk [Member])
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9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | ||||||||||||||
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Sep. 30, 2014
Accounts Receivable [Member]
Google [Member]
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Dec. 31, 2013
Accounts Receivable [Member]
Google [Member]
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Sep. 30, 2014
Accounts Receivable [Member]
Display Advertising Partner [Member]
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Dec. 31, 2013
Accounts Receivable [Member]
Display Advertising Partner [Member]
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Sep. 30, 2014
Revenue [Member]
Google [Member]
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Sep. 30, 2013
Revenue [Member]
Google [Member]
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Sep. 30, 2014
Revenue [Member]
Google [Member]
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Sep. 30, 2013
Revenue [Member]
Google [Member]
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Sep. 30, 2014
Cost of Revenue [Member]
Customer A [Member]
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Sep. 30, 2013
Cost of Revenue [Member]
Customer A [Member]
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Sep. 30, 2014
Cost of Revenue [Member]
Customer A [Member]
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Sep. 30, 2013
Cost of Revenue [Member]
Customer A [Member]
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Sep. 30, 2014
Cost of Revenue [Member]
Customer B [Member]
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Sep. 30, 2013
Cost of Revenue [Member]
Customer B [Member]
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Sep. 30, 2014
Cost of Revenue [Member]
Customer B [Member]
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Sep. 30, 2013
Cost of Revenue [Member]
Customer B [Member]
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Sep. 30, 2013
Cost of Revenue [Member]
Customer C [Member]
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Sep. 30, 2014
Cost of Revenue [Member]
Customer C [Member]
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Sep. 30, 2013
Cost of Revenue [Member]
Customer C [Member]
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Sep. 30, 2014
Cost of Revenue [Member]
Customer D [Member]
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Sep. 30, 2013
Cost of Revenue [Member]
Customer D [Member]
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Sep. 30, 2014
Cost of Revenue [Member]
Customer D [Member]
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Sep. 30, 2013
Cost of Revenue [Member]
Customer D [Member]
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| Schedule of concentrations equal to or exceeding 10% of the Company's accounts receivable and revenue | ||||||||||||||||||||||||||||
| Concentration risk, percentage | 22.00% | 47.00% | 10.00% | 11.00% | 39.00% | 50.00% | 45.00% | 52.00% | 22.00% | 24.00% | 23.00% | 21.00% | 14.00% | 13.00% | 13.00% | 13.00% | 10.00% | [1] | 10.00% | [1] | 11.00% | [1] | 16.00% | 15.00% | 12.00% | 13.00% | ||
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