For the year ended September 30, 2022, goodwill and intangible assets increased from prior year by $63.4 million and $46.5 million, respectively, as a result of a business acquisition. For the year ended September 30, 2021, goodwill and intangible assets increased from the prior year by $21.3 million and $18.4 million, respectively, as a result of a business acquisition. See Note 14, “Business acquisition”. Total amortization expense related to intangible assets was $4.9 million, $0.5 million, and $0.2 million for the years ended September 30, 2022, 2021 and 2020, respectively.


(in thousands)	September 30,
	2022		2021
Balance at beginning of year	22,434		1,138
Business acquisition – additions (see Note 14)	61,768		21,538
Remeasurement adjustments to the deferred tax assets	1,609		(242)
Balance at end of year	$	85,811	$	22,434


	September 30, 2022
(in thousands, except for years)	Weighted average Amortization period in years	Gross carrying amount		Accumulated amortization		Net book value
Developed Technology	11	$	50,020	$	(4,375)	$	45,645
Customer Relationships	11	15,210		(1,767)		13,443
Tradenames & Trademarks	3	900		(250)		650
Total finite-lived intangible assets		$	66,130	$	(6,392)	$	59,738


	September 30, 2021
(in thousands, except for years)	Weighted average Amortization period in years	Gross carrying amount		Accumulated amortization		Net book value
Developed Technology	16	$	19,120	$	(1,361)	$	17,759
Tradenames & Trademarks	2	20		(20)		—
Customer Relationships	1.5	510		(7)		503
Total finite-lived intangible assets		$	19,650	$	(1,388)	$	18,262