5. Commitments and Contingencies Operating Leases In March 2015, the Company entered into a lease agreement for approximately 50,740 square feet of office space located in Redwood City, California for a period beginning in June 2015 through May 2022 with initial annual payments of approximately $2.0 million, increasing to $2.4 million annually during the final year of the lease term. In December 2016, the Company entered into an amendment for an additional approximately 49,980 square feet of office space adjacent to the premises under the original lease (the Expansion Premises), with initial annual payments of $1.2 million, increasing to $2.9 million in the final year of the amended lease term. The lease for the Expansion Premises commences on the earlier of (i) the date the Company commences business operations in the Expansion Premises, or (ii) the date upon which the Landlord substantially completes certain improvements to, and permitting for, the Expansion Premises (the Commencement Date). The Commencement Date is expected to occur in the first half of 2018. The amendment also extends the lease term for the original premises to terminate on the same date as the amended lease. Under the amendment, if the Company is unable to move into the Expansion Premises before the Scheduled Delivery Date, as defined in the amendment, the Company may terminate the lease for the Expansion Premises. In April 2017, the Company entered into a second amendment to the lease for a temporary space of 8,171 square feet for a period beginning in May 2017 and ending on the Commencement Date of the Expansion Premises. The Company entered into a non-cancellable operating lease effective May 1, 2010 for facilities in Menlo Park, California as amended in 2012 to extend the period of the lease until May 31, 2015. In March 2015, the Company extended the lease through September 30, 2015, at which time the lease terminated. In August 2014, the Company entered into a new facility lease for warehouse space beginning on August 21, 2014 through M