Condensed Consolidated Statements of Operations and Comprehensive Loss (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Revenues	$ 60,180	$ 48,127	$ 114,423	$ 90,145
Operating expenses:
Cost of revenues	41,669	29,714	71,111	56,770
Research and development	27,379	31,231	58,621	53,861
Selling, general and administrative	53,965	53,998	96,289	105,096
Change in fair value of contingent considerations and holdbacks	(1,196)	(6,014)	(5,331)	(8,840)
Total operating expenses	121,817	108,929	220,690	206,887
Loss from operations	(61,637)	(60,802)	(106,267)	(116,742)
Interest income	3,464	259	6,504	412
Interest expense	(2)	(29)	(3)	(54)
Other expense, net	(305)	(245)	(462)	(401)
Loss before income taxes	(58,480)	(60,817)	(100,228)	(116,785)
Income tax (provision) / benefit	(676)	149	(752)	10,554
Net loss attributable to common stockholders	(59,156)	(60,668)	(100,980)	(106,231)
Other comprehensive loss:
Change in unrealized gain (loss) on investments	647	(1,113)	1,516	(1,389)
Foreign currency translation adjustment	73	275	438	368
Comprehensive loss	$ (58,436)	$ (61,506)	$ (99,026)	$ (107,252)
Net loss per share attributable to common stockholders—basic (in usd per share)	$ (1.04)	$ (1.13)	$ (1.78)	$ (2.06)
Net loss per share attributable to common stockholders—diluted (in usd per share)	$ (1.04)	$ (1.13)	$ (1.78)	$ (2.06)
Weighted average shares used in computing net loss per share attributable to common stockholders—basic (in shares)	56,777	53,472	56,608	51,673
Weighted average shares used in computing net loss per share attributable to common stockholders—diluted (in shares)	56,777	53,472	56,608	51,673