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Acquisitions - Additional Information (Detail) - USD ($) |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 14, 2020 | Nov. 01, 2019 | Jul. 31, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | $ 807,000 |  | $ 41,471,000 | $ 37,754,000 | $ 36,947,000
Business combination hold back amount due to unrecorded liabilities |  |  |  |  | 1,300,000 |
Business combination holdback amount written off due to inventory obsolescence |  |  | $ 1,300,000 |  |  |
Bargain purchase gain |  |  |  | $ 0 | $ 1,507,000 |
Precision Industries Affiliated Holdings [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percentage of issued and outstanding shares | 100.00% |  |  |  |  |
Marquis |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, transaction value |  | 2,000,000.0 |  |  |  |
Business combination, debt |  | 12,500,000 |  |  |  |
Business combination, Holdback amount |  | $ 1,500,000 |  |  |  |
Business combination, term of employment agreement |  | 5 years |  |  |  |
Business combination, term of non competition and non solicitation covenant |  | 3 years |  |  |  |
Precision Industries Inc [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, transaction value | $ 5,500,000 |  |  |  |  |
Payment to acquire business | 31,500,000 |  |  |  |  |
Business combination, Holdback amount | $ (2,500,000) |  |  |  |  |
Date of merger agreement | Jul. 14, 2020 |  |  |  |  |
Bargain purchase gain | $ 1,507,000 |  |  |  |  |
SW Financial |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage |  |  |  | 100.00% |  |

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