Fair Value Measurements - Schedule of Contingent Consideration Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2022	Mar. 31, 2022
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Contingent consideration expense	$ 3	$ 6
Contingent Consideration [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Contingent consideration liability, beginning balance		817
Contingent consideration expense		6
Contingent consideration liability, ending balance	$ 823	$ 823