Business Combinations - Additional Information (Details) - USD ($) $ in Thousands			1 Months Ended		3 Months Ended		9 Months Ended
	May 23, 2018	Oct. 16, 2017	Jan. 31, 2019	Apr. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Business Acquisition [Line Items]
Payment to acquired business, net of cash acquired							$ 0	$ 29,744
Acquisition-related costs and expenses					$ 1,761	$ 3,154	5,361	5,616
Acquisition-related contingent consideration					$ 1,180		1,180		$ 3,051
Payment of acquisition-related contingent consideration							$ 1,030	$ 0
A2iA
Business Acquisition [Line Items]
Payment to acquired business, net of cash acquired	$ 26,800
Stock issued during acquisition (in shares)	2,514,588
Common stock issued during acquisition, value	$ 21,900
Transaction-related liabilities	200
Acquisition-related costs and expenses	2,200
Payments of cash for collateral	$ 700
Payments for collateral, equity, shares	508,479
Payments for collateral, equity, value	$ 4,400
Period to maintain escrow deposit	24 months
ICAR
Business Acquisition [Line Items]
Payment to acquired business, net of cash acquired		$ 3,000
Stock issued during acquisition (in shares)		584,291
Common stock issued during acquisition, value		$ 5,600
Acquisition-related costs and expenses		500
Period to maintain escrow deposit				24 months
Acquisition-related contingent consideration		2,900
Escrow deposit		1,500		$ 1,500
ICAR | Q4 Consideration
Business Acquisition [Line Items]
Contingent consideration arrangement, range of outcomes, high		1,500
ICAR | Earnout Consideration
Business Acquisition [Line Items]
Contingent consideration arrangement, range of outcomes, high		$ 3,800
Payment of acquisition-related contingent consideration			$ 1,800