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Goodwill and intangible assets (Tables)
6 Months Ended
Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Intangible Assets
The intangible assets balances are presented below:

March 31, 2022
(in thousands, except for years)Weighted average
Amortization period
in years
Gross
carrying
amount
Accumulated
amortization
Net book
value
Developed Technology15$50,020 $(2,745)$47,275 
Customer Relationships1015,210 (792)14,418 
Tradenames & Trademarks3900 (100)800 
Total indefinite-lived intangible assets$66,130 $(3,637)$62,493 

September 30, 2021
(in thousands, except for years)Weighted average
Amortization period
in years
Gross
carrying
amount
Accumulated
amortization
Net book
value
Developed Technology16$19,120 $(1,361)$17,759 
Customer Relationships2510 (7)503 
Total indefinite-lived intangible assets$19,630 $(1,368)$18,262