5. Commitments and Contingencies Operating Leases In March 2015, the Company entered into a lease agreement for approximately 50,000 square feet of office space located in Redwood City, California for a period beginning on June 30, 2015 and ending in 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 a first amendment to the lease for an additional approximately 50,000 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 first amendment also extends the lease term for the original premises to terminate on the same date as the amended lease. Under the first 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 for a period beginning in May 2017 and ending on the Commencement Date of the Expansion Premises. As of June 30, 2017, the Commencement Date of the Expansion Premises has not occurred . In August 2014, the Company entered into a facility lease for warehouse space beginning on August 21, 2014 through May 31, 2015. In March 2015, the Company extended the warehouse lease through February 2017, at which time the lease terminated. The Company entered into a separate non-cancellable facility lease for warehouse space beginning on March 1, 2017 through February 28, 2022, u