Note 3 - Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Marketable Securities [Table Text Block]

	Fair Value Measurements as of June 30, 2022 Using:
	Amortized Cost		Unrealized gains		Unrealized Losses			Fair Value
Assets
Corporate bonds	$	73,184	$	—	$	(416	)	$	72,768
Commercial paper		22,713		—		(52	)		22,661
Certificates of Deposit		5,674		—		(20	)		5,654
Asset-backed securities		4,721		—		(24	)		4,697
Total assets	$	106,292	$	—	$	(512	)	$	105,780

Investments Classified by Contractual Maturity Date [Table Text Block]

	As of
	June 30, 2022
Maturing in one year or less	$	88,480
Maturing after one year through two years		17,300
Maturing after two years		—
Total	$	105,780