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Nature of Operations and Summary of Significant Accounting Policies - Schedule of Changes in Accrual for Warranty and Related Costs (Detail) - USD ($) | 12 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021
Product Warranty Liability [Abstract] |  |
Balance, beginning of year | $ 291,000 | $ 299,000
Warranties issued | 110,000 | 280,000
Warranties settled | (157,000) | (288,000)
Balance, end of year | $ 244,000 | $ 291,000

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- Definition Product warranty liability. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126907703&loc=d3e12565-110249 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(5) -URI https://asc.fasb.org/extlink&oid=126907703&loc=d3e12565-110249 + Details
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- Definition Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI https://asc.fasb.org/extlink&oid=126907703&loc=d3e12565-110249 + Details
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- Definition Amount of increase in the standard and extended product warranty accrual from warranties issued. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3)) -URI https://asc.fasb.org/extlink&oid=126907703&loc=d3e12565-110249 + Details
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