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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

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- Definition Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI https://asc.fasb.org/extlink&oid=109222160&loc=SL51721525-107759 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123586238&loc=d3e38679-109324 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=109222160&loc=d3e1012-107759 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3A -URI https://asc.fasb.org/extlink&oid=109222160&loc=SL51721523-107759 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32672-109319 + Details
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