Business Combinations - Narrative (Details) $ in Thousands		3 Months Ended		9 Months Ended
	May 28, 2021 USD ($) shares	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
Business Acquisition [Line Items]
Acquisition-related costs and expenses		$ 2,224	$ 1,697	$ 5,576	$ 4,884
ID R&D
Business Acquisition [Line Items]
Aggregate purchase price	$ 49,000
Initial cash payment paid for acquisition	$ 13,000
Common stock issued during acquisition (in shares) | shares	867,226
Common stock issued during acquisition, value	$ 13,900
Earnout period shift	1 year
Fair value of contingent consideration	$ 15,300
Acquisition-related costs and expenses	500
Escrow deposit	$ 4,000
Period to maintain escrow deposit	24 months
ID R&D | First Earnout Period
Business Acquisition [Line Items]
Earnout period	1 year
Contingent consideration arrangement, range of outcomes, high	$ 12,300
Earnout percentage	0.15
ID R&D | Second Earnout Period
Business Acquisition [Line Items]
Contingent consideration arrangement, range of outcomes, high	$ 9,800