Acquisition - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Apr. 29, 2022	Sep. 30, 2021
Tangible assets acquired:
Goodwill	$ 354		$ 69
L3Harris Technologies, Inc.
Tangible assets acquired:
Accounts receivable		$ 803
Inventory		370
Contract assets		6,206
Operating lease right-of-use assets		1,529
Property, plant, and equipment		1,996
Net pension benefit assets		1,727
Intangible assets acquired		1,460
Goodwill		285
Liabilities assumed:
Accounts payable and accrued expenses		(1,848)
Contract liabilities		(6,024)
Operating lease liabilities		(1,565)
Asset retirement obligations		(2,500)
Total purchase consideration		$ 2,439