(8) Commitments and Contingencies The Companys headquarters is located in leased office space under a single non-cancelable operating lease at 7250 Redwood Boulevard, Suite 200, Novato, California 94945. The lease expires June 30, 2021, with one five-year extension available thereafter. The Company also has office space under a single non-cancelable operating lease at 101 Federal Street, Suite 1900, Boston, Massachusetts 02110. The initial term of the lease expired on November 30, 2015, but automatically renews for successive one-year periods unless either party terminates the lease by providing at least three months notice of termination to the other party prior to the next renewal date. The Company also has office space under a single non-cancelable operating lease at 1340 Environ Way, #305, Chapel Hill, North Carolina 27517. The initial term of the lease expired on November 30, 2014, but automatically renews for successive three-month periods unless either party terminates the lease by providing at least two months notice of termination to the other party prior to the next renewal date. The Company also has office space under a single, non-cancelable operating sub-lease at 4800 Bee Caves Road, Suite 100, Austin, Texas 78746, where it occupies approximately 600 square feet and has the right to use all common areas. The term of the sub-lease commenced on January 4, 2018, and expires on December 31, 2018, but will automatically renew for successive six-month periods unless either party gives at least 60 days notice of termination to the other party prior to the renewal date. Total rent expense for the three and nine months ended June 30, 2018, were $0.1 million and $0.4 million, respectively. As of June 30, 2018, there were no material changes in the leasing arrangements that would have a significant effect on future minimum lease payments reported in the Companys Annual Report on Form 10-K for the fiscal year ended September 30, 2017.