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Property and Equipment, Net - Depreciation of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Property, Plant and Equipment [Line Items] |  |  |
Total depreciation and amortization | $ 182 | $ 133 | $ 385
Cost of Revenues [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total depreciation and amortization | 180 |  |
Sales and Marketing Expense [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total depreciation and amortization | 1 |  |
General and Administrative Expense [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total depreciation and amortization | $ 1 |  |

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration