Stock-based Compensation - Share-based Payment Arrangement, Expensed and Capitalized, Amount (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Share-based Payment Arrangement, Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ (6)	$ 146
Share-based Payment Arrangement, Option | Fiscal Year 2017 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	(6)	18
Share-based Payment Arrangement, Option | Fiscal Year 2019 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	0	128
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	580	53
Restricted Stock | Fiscal Year 2019 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	15	38
Restricted Stock | Fiscal Year 2020 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 565	$ 15