Summary of Significant Accounting Policies - Stock-Based Compensation (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Total stock compensation expense | $ 824 | $ 2,613 | $ 1,653 |
Executives | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Total stock compensation expense | 778 | 1,754 | 880 |
Executive forfeitures | (823) | 0 | 0 |
Board of Directors | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Total stock compensation expense | $ 869 | $ 859 | $ 773 |