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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2022	Oct. 31, 2021	Sep. 30, 2021
Payments under consideration agreement	$ 99	$ 119
Contingent consideration, liability	400				$ 500
Operating lease payments	0
Europe
Optional lease extension term (in years)				5 years
Lease liability				$ 1,200
Europe \| Forecast
Operating lease term (in years)			14 years
iDevices LLC
Contingent consideration arrangements, high range of outcomes, value	15,000
iDevices LLC \| Earnout and development agreement
Contingent consideration arrangements, minimum outcome	$ 8,000
Contingent consideration arrangements range of outcomes term (in years)	10 years
Other Noncurrent Liabilities
Product warranty accrual, noncurrent	$ 24,900				23,100
Accounts Payable and Accrued Liabilities
Product warranty accrual, current	$ 5,500				$ 5,200