Fair Value Measurements

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Fair value measurements

3. Fair value measurements

The following tables present information about the Company’s financial assets measured at fair value on a recurring basis and indicate the level of the fair value hierarchy utilized to determine such fair values:

	Fair value measurements as of December 31, 2021
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	144,897	$	—	$	—	$	144,897
Total	$	144,897	$	—	$	—	$	144,897
Marketable Securities:
Corporate bonds	$	—	$	17,524	$	—	$	17,524
Commercial paper	$	—	$	27,487	$	—	$	27,487
US Government debt securities	$	—	$	29,904	$	—	$	29,904
Total	$	—	$	74,915	$	—	$	74,915

	Fair value measurements as of December 31, 2020
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	287,308	$	—	$	—	$	287,308
Total	$	287,308	$	—	$	—	$	287,308
Marketable Securities:
Corporate bonds	$	—	$	—	$	—	$	—
Commercial paper	$	—	$	—	$	—	$	—
US Government debt securities	$	—	$	—	$	—	$	—
Total	$	—	$	—	$	—	$	—

The Company’s cash equivalents and marketable securities are carried at fair value, determined according to the fair value hierarchy described above and in Note 2. The carrying value of the Company’s accounts payable and accrued expenses approximate their fair values due to the short-term nature of these liabilities.

The Company’s assets with fair value categorized as Level 1 within the fair value hierarchy include money market funds. Money market funds are publicly traded mutual funds and are presented as cash equivalents on the consolidated balance sheets as of December 30, 2021 and December 31, 2020.

The Company measures its marketable securities at fair value on a recurring basis and classifies those instruments within Level 2 of the fair value hierarchy. Marketable securities are valued using models or other valuation methodologies that use Level 2 inputs. These models are primarily industry-standard models that consider various assumptions, including time value, yield curve, volatility factors, default rates, current market and contractual prices for the underlying financial instruments, as well as other economic measures. Substantially all of these assumptions are observable in the marketplace, can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace.

There were no transfers to Level 3 in the periods presented.