Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Details)

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Income Taxes - Additional Information (Details) - USD ($)
3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Sep. 30, 2019
Income Tax Contingency [Line Items]      
Income tax expense $ 41,000 $ 582,000  
Income tax expense from discontinued operations 19,000 $ 18,000  
Unrecognized tax benefits that would impact effective tax rate 1,300,000   $ 1,300,000
Accrual for potential interest and penalties $ 800,000   $ 800,000
Minimum      
Income Tax Contingency [Line Items]      
Number of years open for tax examinations 3 years    
Maximum      
Income Tax Contingency [Line Items]      
Number of years open for tax examinations 5 years