Facility Leases	3 Months Ended
Mar. 31, 2016
Leases [Abstract]
Facility Leases	9. Facility Leases We lease a building in Mountain View, California which we began to occupy in the fourth quarter of 2007. We recognize rental expense on the facility on a straight line basis over the initial term of the lease. Differences between the straight line rent expense and rent payments are classified as deferred rent liability on the balance sheet. The lease for the building expires on March 31, 2018, and we have two options to extend the lease for five years each.

Facility Leases

3 Months Ended

Mar. 31, 2016

9. Facility Leases

We lease a building in Mountain View, California which we began to occupy in the fourth quarter of 2007. We recognize rental expense on the facility on a straight line basis over the initial term of the lease. Differences between the straight line rent expense and rent payments are classified as deferred rent liability on the balance sheet. The lease for the building expires on March 31, 2018, and we have two options to extend the lease for five years each.