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Short-term investments (Details) - USD ($) $ in Thousands	6 Months Ended	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Mar. 31, 2022
US Government Agency bonds
Short-term investments
Amortized cost	$ 47,268		$ 26,827
Gross unrealized gains	1	$ 0
Gross unrealized losses	(325)	(139)
Credit Losses	0		0
Fair value	46,944		26,688
US Treasury bonds
Short-term investments
Amortized cost	237,067		264,162
Gross unrealized gains	5	0
Gross unrealized losses	(1,126)	(1,143)
Credit Losses	0		0
Fair value	235,946		263,019
Short-term investments
Short-term investments
Amortized cost	284,335		290,989
Gross unrealized gains	6	0
Gross unrealized losses	(1,451)	$ (1,282)
Credit Losses	0		0
Fair value	282,890		$ 289,707
2023	$ 7,600

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Amount of unrealized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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