10. Commitments and Contingencies In July 2012, the Company entered into a lease for its new principal executive offices at One Marina Park Drive, Floors 4-6, Boston, Massachusetts. The lease term is through July 2020 and the lease contains both a rent holiday period and escalating rental payments over the lease term. The lease requires payments for additional expenses such as taxes, maintenance, and utilities and contains a fair value renewal option. The Company began occupying the space during the second quarter of fiscal 2013. In accordance with the terms of the lease, the landlord provided certain lease incentives with respect to the leasehold improvements. In accordance with ASC 840, Leases (ASC 840), the Company recorded the incentives as deferred rent and will reflect these amounts as reductions of lease expense over the lease term. Although lease payments under this arrangement did not commence until August 2013, as the Company had the right to use and controlled physical access to the space, it determined that the lease term commenced in July 2012 and, as a result, began recording rent expense on this lease arrangement at that time on a straight-line basis. The lease also contains certain provisions requiring the Company to restore certain aspects of the leased space to its initial condition. The Company has determined that these provisions represent asset retirement obligations and recorded the estimated fair value of these obligations as the related leasehold improvements were incurred. The Company will accrete the liability to fair value over the life of the lease as a component of operating expenses. As of March 31, 2014, the Company recorded an asset retirement obligation of $410. In March 2014, the Company entered into a lease for its California operations. The lease term runs through September 2019 and the lease contains both a rent holiday period and escalating rental payments over the lease term. The lease requires payments for additional expenses such as taxes, maintenance, and utilities and co