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Acquisition - Schedule of Preliminary Allocation of Cost of Acquisition as Adjusted to Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 01, 2021
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Assets acquired: |  |  |
Goodwill | $ 22,823 |  |
Barber-Nichols, Inc. [Member] |  |  |
Assets acquired: |  |  |
Cash and cash equivalents |  |  | $ 1,587
Accounts receivable |  |  | 8,074
Unbilled revenue |  |  | 7,068
Inventory |  |  | 3,669
Other current assets |  |  | 409
Property, plant & equipment |  |  | 8,037
Operating lease asset |  |  | 9,026
Goodwill |  | $ 22,823 | 22,823
Total assets acquired |  |  | 93,893
Liabilities assumed: |  |  |
Accounts payable |  |  | 2,656
Accrued compensation |  |  | 1,341
Other current liabilities |  |  | 665
Customer deposits |  |  | 6,048
Operating lease liabilities |  |  | 9,066
Other long term liabilities |  |  | 2,103
Total liabilities assumed |  |  | 21,879
Purchase price |  |  | 72,014
Backlog [Member] | Barber-Nichols, Inc. [Member] |  |  |
Assets acquired: |  |  |
Intangibles |  |  | 3,900
Customer Relationships [Member] | Barber-Nichols, Inc. [Member] |  |  |
Assets acquired: |  |  |
Intangibles |  |  | 11,800
Technology and Technical Know-How [Member] | Barber-Nichols, Inc. [Member] |  |  |
Assets acquired: |  |  |
Intangibles |  |  | 10,100
Tradename [Member] | Barber-Nichols, Inc. [Member] |  |  |
Assets acquired: |  |  |
Intangibles |  |  | $ 7,400

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