Fair value measurements (Tables)

12 Months Ended

Dec. 31, 2022

Fair value measurements

Assets and liabilities measured at fair value on a recurring basis

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2022 and 2021 are as follows:

			Quoted Prices		Significant
			in Active		Other		Significant
			Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
Assets	Total		(Level 1)		(Level 2)		(Level 3)
	(in thousands)
December 31, 2022
Money market funds included in cash and cash equivalents	$	91,724	$	91,724	$	—	$	—
Marketable securities- U.S. Treasury notes		19,889		19,889		—		—
Total	$	111,613	$	111,613	$	—	$	—
December 31, 2021
Money market funds included in cash and cash equivalents	$	100,305	$	100,305	$	—	$	—
Marketable securities- U.S. Treasury notes		15,106		15,106
Total	$	115,411	$	115,411	$	—	$	—