Summary of Significant Accounting Policies - Property and Equipment (Details)	12 Months Ended
Dec. 31, 2015
Computer equipment and software
Property and equipment, net
Useful life	3 years
Furniture and fixtures \| Minimum
Property and equipment, net
Useful life	5 years
Furniture and fixtures \| Maximum
Property and equipment, net
Useful life	7 years
Leasehold improvements
Property and equipment, net
Useful life	Shorter of lease term or useful life
Office equipment \| Minimum
Property and equipment, net
Useful life	3 years
Office equipment \| Maximum
Property and equipment, net
Useful life	5 years

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=51655414&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=51661791&loc=d3e1205-110223

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration