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Investments (Tables)

12 Months Ended

Dec. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Summary of Investments Classified as Available-for-sale

Our investments, which are all classified as available-for-sale, consisted of the following:

			As of December 31, 2020
			Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Fair Value
			(in thousands)
Description:
U.S. Government agencies			$	83,596					$	3					$	(12)					$	83,587
Corporate bonds			24,162						31						(1)						24,192
Commercial paper			34,766						—						—						34,766
Agency bonds			3,998						1						—						3,999
Asset-backed securities			2,419						—						—						2,419
Total			$	148,941					$	35					$	(13)					$	148,963

			As of December 31, 2019
			Amortized Cost						Gross Unrealized Gains						Gross Unrealized Losses						Fair Value
			(in thousands)
Description:
U.S. Government agencies			$	36,880					$	99					$	—					$	36,979
Commercial paper			19,965						1						—						19,966
Corporate bonds			60,803						77						(2)						60,878
Agency bonds			12,198						44						—						12,242
Asset-backed securities			8,986						1						(7)						8,980
Total			$	138,832					$	222					$	(9)					$	139,045

As of December 31, 2020 and 2019, our available-for-sale investments had maturities ranging from 1 to 16 months and from 3 months to 2 years, respectively

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Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.

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