CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables)

3 Months Ended

Mar. 31, 2021

Cash And Cash Equivalents [Abstract]

Schedule of Cash, Cash Equivalents

The following table provides details regarding the Company’s portfolio of cash and cash equivalents (in thousands):

	Amortized		Unrealized					Aggregate Fair
Cash and Cash Equivalents Classification	Cost		Gains		(Losses)			Market Value
March 31, 2021
Cash accounts in banking institutions	$	160,850	$	—	$	—		$	160,850
Money market accounts		16,438		—		—			16,438
U.S. Government bonds		548,997		—		(6	)		548,991
	$	726,285	$	—	$	(6	)	$	726,279
December 31, 2020
Cash accounts in banking institutions	$	163,779	$	—	$	—		$	163,779
Money market accounts		17,261		—		—			17,261
U.S. Government bonds		448,970		6		(4	)		448,972
	$	630,010	$	6	$	(4	)	$	630,012

Schedule of Short-Term Investments

The following table provides details regarding the Company’s portfolio of short-term investments (in thousands):

	Amortized		Unrealized				Aggregate Fair
Short-term Investments Classification	Cost		Gains		(Losses)		Market Value
March 31, 2021
Certificates of deposit	$	720	$	—	$	—	$	720
	$	720	$	—	$	—	$	720
December 31, 2020
U.S. Government bonds	$	99,929	$	67	$	—	$	99,996
	$	99,929	$	67	$	—	$	99,996