Cash, cash equivalents, restricted cash and available-for-sale marketable securities - Cash, cash equivalents, and marketable securities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Amortized Cost
Cash and cash equivalents	$ 268,321	$ 98,959	$ 131,873
Total money market funds and marketable securities	265,722	111,704
Debt securities, unrealized loss position	5,000	19,900
Debt securities, unrealized gain position	0	0
Fair Value
Total money market funds and marketable securities	265,718	111,613
Unrealized Gains and Losses
Total money market funds and marketable securities	$ (4)	(91)
Maximum
Amortized Cost
Debt securities, contractual maturity period	1 year
Money market funds
Amortized Cost
Cash and cash equivalents	$ 260,725	91,724
Fair Value
Cash and cash equivalents	260,725	91,724
U.S. Treasury notes
Amortized Cost
Marketable securities, amortized cost	4,997	19,980
Fair Value
Marketable securities, fair value	4,993	19,889
Unrealized Gains and Losses
Marketable securities, unrealized losses	$ (4)	$ (91)