Investment in variable interest entity (Details) $ in Thousands				3 Months Ended	6 Months Ended
	Apr. 06, 2022 USD ($)	Feb. 03, 2022 USD ($)	Nov. 01, 2021 USD ($) item	Mar. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)
Variable Interest Entity [Line Items]
Total assets				$ 1,021,636	$ 1,021,636		$ 702,097
Total liabilities				158,275	158,275		$ 121,276
Revelar
Variable Interest Entity [Line Items]
Additional SAFE issued		$ 2,500
Revelar | Subsequent events
Variable Interest Entity [Line Items]
Additional SAFE issued	$ 2,500
Variable Interest Entity, Primary Beneficiary | Revelar
Variable Interest Entity [Line Items]
Eligible success based payments to be received			$ 100,000
Additional antibody therapeutics that may license | item			5
Period of additional antibody therapeutics that maybe licensed			4 years
Investment amount			$ 5,000
Ownership percentage			49.80%
Loss absorbed by reporting entity				3,900	7,000
Total assets				$ 6,500	$ 6,500
Total liabilities						$ 6,000
Variable Interest Entity, Primary Beneficiary | Revelar | Maximum
Variable Interest Entity [Line Items]
Investment amount			$ 10,000