All marketable securities were considered available-for-sale as of March 31, 2022. The amortized cost, gross unrealized holding gains or losses, and fair value of the Company’s marketable securities by major security type are summarized in the table below (in thousands):

	March 31, 2022
	Amortized Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
Available-for-sale securities
U.S. treasuries classified as marketable securities	$	167,352	$	—	$	(313	)	$	167,039
Total available-for-sale securities	$	167,352	$	—	$	(313	)	$	167,039

The amortized cost of available-for-sale securities is adjusted for amortization of premiums and accretion of discounts to maturity. As of March 31, 2022, the aggregate fair value of securities with remaining maturities of less than one year held by the Company in an unrealized loss position was $154.1 million. The aggregate fair value of securities with remaining maturities of more than one year held by the Company in an unrealized loss position was $12.9 million. The Company has the intent and ability to hold such securities until recovery and has determined that there has been no material change to its credit risk. As a result, the Company determined it did not hold any investments with a credit loss at March 31, 2022.

There were no realized gains or losses recognized on the sale or maturity of available-for-sale securities during the three months ended March 31, 2022, and as a result, there were no reclassifications out of accumulated other comprehensive gain (loss) for the same periods.