CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2020

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
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
December 31, 2019
Cash accounts in banking institutions	$	119,272	$	—	$	—		$	119,272
Money market accounts		12,355		—		—			12,355
	$	131,627	$	—	$	—		$	131,627

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
December 31, 2020
U.S. Government bonds	$	99,929	$	67	$	—		$	99,996
	$	99,929	$	67	$	—		$	99,996
December 31, 2019
Certificates of deposit	$	700	$	—	$	—		$	700
U.S. Government bonds		513,577		190		(6	)		513,761
	$	514,277	$	190	$	(6	)	$	514,461