Sale of future royalties - Narrative (Details) - USD ($) $ in Thousands			6 Months Ended		9 Months Ended	36 Months Ended
	Jul. 02, 2019	Jan. 01, 2019	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2014	Jun. 30, 2022
Other Liabilities Disclosure [Line Items]
Non-cash royalty revenue			$ 1,944	$ 3,048
Non-cash interest expense			$ 366	985
Minimum
Other Liabilities Disclosure [Line Items]
Royalty interest, % interest			0.75%
Maximum
Other Liabilities Disclosure [Line Items]
Royalty interest, % interest			1.125%
OMERS
Other Liabilities Disclosure [Line Items]
Gross proceeds from sale of royalty interest. before advisory fees		$ 20,000
Entitlement of royalties to be received	$ 30,000	30,000
Future royalty payments	30,000	$ 30,000
Transaction costs on sale of royalties	$ 1,500
Effective annual interest rate on royalty liability			7.20%
Non-cash royalty revenue			$ 1,900	3,000		$ 20,800
Non-cash interest expense			$ 400	$ 1,000
OMERS | Minimum
Other Liabilities Disclosure [Line Items]
Royalty interest, % interest	1.00%				1.00%
OMERS | Maximum
Other Liabilities Disclosure [Line Items]
Royalty interest, % interest	2.33%				2.33%