Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.22.2.2
Income Taxes - Additional Information (Details) - USD ($)
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Income Tax Contingency [Line Items]      
(Reductions) additions to valuation allowance $ (3,292,000) $ 1,559,000  
Operating loss carryforwards, annual utilization limits $ 800,000    
Operating loss carryforwards, utilization limit, percent 80.00%    
Unrecognized tax benefits that would impact effective tax rate $ 1,000,000.0    
Net (benefit) expense for interest and penalties 100,000 (100,000) $ 4,000
Cumulative accrual for potential interest and penalties $ 700,000 $ 600,000  
Net operating loss statute carryback claim ending year 2023    
Net operating loss statute carryback claim open year 2016    
Maximum      
Income Tax Contingency [Line Items]      
Operating loss carry forwards expiration year 2035    
Minimum      
Income Tax Contingency [Line Items]      
Operating loss carry forwards expiration year 2032    
Federal      
Income Tax Contingency [Line Items]      
Net operating loss carryforwards $ 10,000,000.0    
Net operating loss carryforwards with indefinite carryforward period $ 68,000,000.0    
Number of years open for tax examinations 3 years    
Foreign Tax Authority      
Income Tax Contingency [Line Items]      
Net operating loss carryforwards $ 0    
Tax credit carryforwards $ 800,000    
Foreign Tax Authority | Maximum      
Income Tax Contingency [Line Items]      
Number of years open for tax examinations 5 years    
Tax credit carry forwards expiration year 2031    
Foreign Tax Authority | Minimum      
Income Tax Contingency [Line Items]      
Number of years open for tax examinations 3 years    
Tax credit carry forwards expiration year 2030    
State Jurisdiction      
Income Tax Contingency [Line Items]      
Net operating loss carryforwards $ 14,000,000.0    
State Jurisdiction | Maximum      
Income Tax Contingency [Line Items]      
Number of years open for tax examinations 5 years    
State Jurisdiction | Minimum      
Income Tax Contingency [Line Items]      
Number of years open for tax examinations 3 years    
Tempress      
Income Tax Contingency [Line Items]      
Income tax expense (benefit) from discontinued operations     (11,100,000)
R2D      
Income Tax Contingency [Line Items]      
Income tax expense (benefit) from discontinued operations     $ 200,000