Commitments and Contingencies (Textual) (Details) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended			6 Months Ended
	Mar. 31, 2014 extension	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2012 Fifth Amendment [Member]	Jun. 30, 2014 Sixth Amendment [Member]	Jun. 30, 2014 Headquarters, Redwood City [Member] Fifth Amendment [Member] sqft	Jun. 30, 2014 Penobscot Space, Building 2 Space, and Saginaw Space [Member] Fifth Amendment [Member]	Jun. 30, 2014 Chesapeake Space [Member]
Commitments and Contingencies [Line Items]
Lease area space occupancy (square feet)						107,000
Expiration date of lease							Jan. 31, 2020	Jan. 31, 2017
Payments for Capital Improvements				$ 3,600,000
Tenant Reimbursements				3,100,000
Incentive from Lessor		1,948,000	1,948,000
Term of sublease	3 years
Number of sublease renewal options	2
Term of sublease renewal	1 year
Sublease income		100,000	100,000
Letters of credit					707,000
Asset retirement obligations		109,000	109,000
Estimated obligation payable		$ 600,000	$ 600,000