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Summary of Significant Accounting Policies (Details 3)	12 Months Ended
	Dec. 31, 2012
Furniture and fixtures [Member]
Depreciation and amortization of property and equipment, useful life
Property Plant and Equipment Useful Life	7 years
Leasehold improvements [Member]
Depreciation and amortization of property and equipment, useful life
Property, Plant and Equipment, Estimated Useful Lives	Shorter of asset life or lease term
Maximum [Member] | Computers and equipment [Member]
Depreciation and amortization of property and equipment, useful life
Property Plant and Equipment Useful Life	10 years
Maximum [Member] | Computer software [Member]
Depreciation and amortization of property and equipment, useful life
Property Plant and Equipment Useful Life	5 years
Minimum [Member] | Computers and equipment [Member]
Depreciation and amortization of property and equipment, useful life
Property Plant and Equipment Useful Life	3 years
Minimum [Member] | Computer software [Member]
Depreciation and amortization of property and equipment, useful life
Property Plant and Equipment Useful Life	3 years

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X

- Definition

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).

+ References

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=6367646&loc=d3e18780-107790



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-URI http://asc.fasb.org/subtopic&trid=2155824

+ Details

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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