The 401(k) Benefit Plan	12 Months Ended
Sep. 30, 2019
Defined Contribution Plan [Abstract]
401(k) Benefit Plan	401(k) Benefit PlanThe Company has a retirement plan (the Plan), which is intended to be a qualified plan under Section 401(k) of the Internal Revenue Code. The Plan is a defined contribution plan available to all eligible employees and allows participants to contribute up to the legal maximum of their eligible compensation, not to exceed the maximum tax-deferred amount allowed by the Internal Revenue Service. The Plan also allows the Company to make discretionary matching contributions. For the years ended September 30, 2019, September 30, 2018 and September 30, 2017, the Company recorded expenses of $1.6 million, $1.4 million and $2.1 million, respectively, related to its contributions to the Plan.

The 401(k) Benefit Plan

12 Months Ended

Sep. 30, 2019

Defined Contribution Plan [Abstract]

401(k) Benefit PlanThe Company has a retirement plan (the Plan), which is intended to be a qualified plan under Section 401(k) of the Internal Revenue Code. The Plan is a defined contribution plan available to all eligible employees and allows participants to contribute up to the legal maximum of their eligible compensation, not to exceed the maximum tax-deferred amount allowed by the Internal Revenue Service. The Plan also allows the Company to make discretionary matching contributions. For the years ended September 30, 2019, September 30, 2018 and September 30, 2017, the Company recorded expenses of $1.6 million, $1.4 million and $2.1 million, respectively, related to its contributions to the Plan.