Investments and Fair Value Measurements

3 Months Ended

Mar. 31, 2023

Investments and Fair Value Measurements

Investments and Fair Value Measurements

5. Investments and Fair Value Measurements

Available-for-Sale Securities

The estimated fair value of marketable securities is based on quoted market prices for these or similar investments obtained from a commercial pricing service. The fair market value of marketable securities classified within Level 1 is based on quoted prices for identical instruments in active markets. The fair value of marketable securities classified within Level 2 is based on quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; or model-driven valuations whose inputs are observable or whose significant value drivers are observable. Observable inputs may include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including market research publications.

Available-for-sale securities are summarized below:

		March 31, 2023
				Gross		Gross
		Amortized		Unrealized		Unrealized		Estimated
(In thousands)		Cost		Gains		Losses		Fair Value
US government securities	Level 1	$	29,119	$	6	$	(6)	$	29,119
US government agency securities	Level 2		9,259		10		—		9,269
Corporate notes	Level 2		38,906		63		(20)		38,949
Commercial paper	Level 2		14,927		—		(2)		14,925
Marketable securities			92,211		79		(28)		92,262
Money market funds	Level 1		149,116		—		—		149,116
Total		$	241,327	$	79	$	(28)	$	241,378

		December 31, 2022
				Gross		Gross
		Amortized		Unrealized		Unrealized		Estimated
(In thousands)		Cost		Gains		Losses		Fair Value
US government securities	Level 1	$	24,873	$	8	$	—	$	24,881
US government agency securities	Level 2		20,869		4		—		20,873
Commercial paper	Level 2		37,307		—		(27)		37,280
Marketable securities			83,049		12		(27)		83,034
Money market funds	Level 1		220,508		—		—		220,508
Total		$	303,557	$	12	$	(27)	$	303,542

As of March 31, 2023, all of the Company’s available-for-sale securities had contractual maturities within 15 months, and the weighted-average maturity of marketable securities was approximately three months. There were no transfers between Level 1 and Level 2 during the periods presented, and there have been no material changes to the Company’s valuation techniques during the three months ended March 31, 2023.

Available-for-sale debt securities with unrealized losses are summarized below:

	March 31, 2023
	Less than 12 Months				Greater than 12 Months				Total
			Gross				Gross				Gross
	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
(In thousands)	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
US government securities	$	14,525	$	(6)	$	—	$	—	$	14,525	$	(6)
Corporate notes		16,434		(20)		—		—		16,434		(20)
Commercial paper		14,926		(2)		—		—		14,926		(2)
Total	$	45,885	$	(28)	$	—	$	—	$	45,885	$	(28)

	December 31, 2022
	Less than 12 Months				Greater than 12 Months				Total
			Gross				Gross				Gross
	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
(In thousands)	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Commercial paper		37,279		(27)		—		—		37,279		(27)
Total	$	37,279	$	(27)	$	—	$	—	$	37,279	$	(27)

The Company invests primarily in high credit quality and short-term maturity debt securities with the intent to hold such securities until maturity at par value. The Company does not intend to sell the investments that are currently in an unrealized loss position, and it is unlikely that it will be required to sell the investments before recovery of their amortized cost basis, which may be at maturity. The Company reviewed its available-for-sale debt securities and determined that there were no credit-related losses to be recognized as of March 31, 2023.

As of March 31, 2023, the Company’s accumulated other comprehensive income on its condensed consolidated balance sheets consisted of net unrealized gains on available-for-sale investments. For the three months ended March 31, 2023, the Company sold marketable securities for total proceeds of $62.9 million and recognized a realized gain from the sale of $0.2 million based on the specific identification method. For the three months ended March 31, 2022, the Company did not sell any marketable securities.