Retirement Plans (Details) - USD ($)	12 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Retirement Plans
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 194,000	$ 179,000

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration