Fair value measurements (Tables)

3 Months Ended

Mar. 31, 2020

Schedule of assets and liabilities measured and carried at fair value


					Significant
			Quoted Prices		Other		Significant
			in Active		Observable		Unobservable
	Fair		Markets		Inputs		Inputs
	Value		(Level 1)		(Level 2)		(Level 3)
March 31, 2020
Marketable securities:
Commercial paper	$	5,983	$	—	$	5,983	$	—
Corporate bonds		11,993		—		11,993		—
	$	17,976	$	—	$	17,976	$	—


					Significant
			Quoted Prices		Other		Significant
			in Active		Observable		Unobservable
	Fair		Markets		Inputs		Inputs
	Value		(Level 1)		(Level 2)		(Level 3)
December 31, 2019
Marketable securities:
Commercial paper	$	11,940	$	—	$	11,940	$	—
Corporate bonds		12,010		—		12,010		—
U.S. Treasuries		13,489		13,489		—		—
	$	37,439	$	13,489	$	23,950	$	—

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

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