Investments (Tables)

9 Months Ended

Sep. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The amortized cost and fair value of the available-for-sale investments and unrealized gains and losses were as follows (in thousands):

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses	Fair Value
Corporate securities and commercial paper	$	25,291	$	64	—	$	25,355
Asset-backed securities	660		—		—	660
Certificates of deposit	10,118		—		—	10,118
Total	$	36,069	$	64	—	$	36,133

Schedule of Contractual Maturity of Available-for-sale Investments

The contractual maturity of the available-for-sale investments were as follows (in thousands):

			December 31, 2019
	Less than 1 year		1 to 5 years		More than 5 years		Total
Corporate securities and commercial paper	$	17,187	$	8,168	$	—	$	25,355
Asset-backed securities	0		660		0		660
Certificates of deposit	8,120		1,998		0		10,118
Total	$	25,307	$	10,826	$	—	$	36,133