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Segment Information (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2021 USD ($) segment geographic_region	Dec. 31, 2020 USD ($)	Sep. 30, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	1
Number of geographic regions | geographic_region	3
Net revenues	$ 687,100	$ 624,617
Long-lived assets	$ 185,355		$ 191,164
Net Revenue | Geographic Concentration | Ingram Micro, Inc.
Segment Reporting Information [Line Items]
Concentration risk percentage	18.70%	18.10%
Net Revenue | Geographic Concentration | Synnex Corporation
Segment Reporting Information [Line Items]
Concentration risk percentage	12.20%	10.00%
Product
Segment Reporting Information [Line Items]
Net revenues	$ 343,149	$ 288,045
Product | Systems [Member]
Segment Reporting Information [Line Items]
Net revenues	180,157	178,571
Product | Software [Member]
Segment Reporting Information [Line Items]
Net revenues	162,992	109,474
United States
Segment Reporting Information [Line Items]
Net revenues	381,289	320,343
Long-lived assets	147,012		153,030
Other
Segment Reporting Information [Line Items]
Net revenues	21,702	22,793
Total Americas
Segment Reporting Information [Line Items]
Net revenues	402,991	343,136
EMEA
Segment Reporting Information [Line Items]
Net revenues	162,062	162,084
Long-lived assets	20,953		20,526
Asia Pacific
Segment Reporting Information [Line Items]
Net revenues	122,047	$ 119,397
Other countries
Segment Reporting Information [Line Items]
Long-lived assets	$ 17,390		$ 17,608

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