Short-Term Investment (Tables)

3 Months Ended

Mar. 31, 2022

Short-term Investments [Abstract]

Schedule of Short-term Investments Available For Sale

Short-term investments, principally U.S. Treasury bills, are available-for-sale and consisted of the following (in thousands):

	As of March 31, 2022
	Amortized Cost		Unrealized Loss, Net			Estimated Fair Value
Government securities	$	119,798	$	(83	)	$	119,715

	As of December 31, 2021
	Amortized Cost		Unrealized Loss, Net			Estimated Fair Value
Government securities	$	134,980	$	(9	)	$	134,971