Stockholders' Equity - Stock compensation expense (Details) - USD ($)	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Stock Based Compensation [Line Items]
Stock Compensation Expense	$ 362,000	$ 457,000
Common Stock [Member]
Stock Based Compensation [Line Items]
Stock Compensation Expense	282,000	287,000
Restricted Stock Grants [Member]
Stock Based Compensation [Line Items]
Stock Compensation Expense	34,000	55,000
Option Grants [Member]
Stock Based Compensation [Line Items]
Stock Compensation Expense	0	17,000
Employee Stock Purchase Plan [Member]
Stock Based Compensation [Line Items]
Stock Compensation Expense	3,000	3,000
Subsidiary Option Grants [Member]
Stock Based Compensation [Line Items]
Stock Compensation Expense	$ 43,000	$ 95,000