Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Narrative) (Details)

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Employee Benefit Plans (Narrative) (Details) - USD ($)
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
401(k) [Member]    
Defined Contribution Plan [Line Items]    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount (in Dollars)   $ 83,000
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 100.00%  
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 4.00%  
Defined Benefit Plan, Contributions by Employer (in Dollars) $ 121,000  
Simple Individual Retirement Account Plan [Member]    
Defined Contribution Plan [Line Items]    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount (in Dollars) $ 15,500  
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 100.00%  
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 3.00%  
Defined Benefit Plan, Contributions by Employer (in Dollars)   22,000
Foreign Postretirement Benefit Plan [Member]    
Defined Contribution Plan [Line Items]    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 3.00%  
Defined Benefit Plan, Contributions by Employer (in Dollars) $ 29,000 $ 23,000