Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Schedule of Financial Instruments, by Fair Value Hierarchy

The carrying value and fair value, by fair value hierarchy, of the Company's financial instruments at December 31, 2022 and 2021 are as follows (in thousands):

			Fair Value Measurements at December 31, 2022
	Fair Value at December 31, 2022		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Recurring
Marketable securities
U.S. Treasury notes	$	56,074	$	56,074	$	—	$	—
U.S. Government sponsored enterprise securities	111,334		111,334		—		—
Total recurring	$	167,408	$	167,408	$	—	$	—

			Fair Value Measurements at December 31, 2021
	Fair Value at December 31, 2021		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Recurring
Marketable securities
U.S. Treasury notes	$	225,792	$	225,792	$	—	$	—
U.S. Government sponsored enterprise securities	113,944		113,944		—		—
Other
Liability-classified restricted stock awards	702		702		—		—
Total recurring	$	340,438	$	340,438	$	—	$	—

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments

The carrying values and estimated fair values of the 2021 Bonds as of December 31, 2022 are summarized as follows (in thousands):

	Carrying Value		Estimated Fair Value
2021 Bonds	$	67,223	$	65,438