CASH AND INVESTMENTS (Tables)

6 Months Ended

Jun. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of Cash, Cash Equivalents and Investments

The following is a summary of cash and marketable investments, including those that meet the definition of a cash equivalent, as of December 31, 2019 (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Cash	$	67,818	$	—	$	—	$	67,818
Cash equivalents:
Money market funds	126,075		—		—		126,075
Corporate bonds	1,000		—		—		1,000
Agency bonds	6,485		1		—		6,486
Commercial paper	9,609		—		(1)		9,608
Certificates of deposit	171		—		—		171
US treasury securities	4,749		—		—		4,749
Total cash equivalents	148,089		1		(1)		148,089
Total cash and cash equivalents	$	215,907	$	1	$	(1)	$	215,907
Short-term investments:
Corporate bonds	$	103,130	$	110	$	(7)	$	103,233
Agency bonds	3,966		2		—		3,968
US treasury securities	50,703		62		(1)		50,764
Commercial paper	23,827		1		—		23,828
Certificates of deposit	3,936		2		(1)		3,937
Asset-backed securities	15,837		12		—		15,849
Total short-term investments	$	201,399	$	189	$	(9)	$	201,579
Long-term marketable investments:
Corporate bonds	$	19,407	$	12	$	(4)	$	19,415
US treasury securities	19,300		25		—		19,325
Asset-backed securities	11,693		10		(1)		11,702
Total long-term marketable investments	$	50,400	$	47	$	(5)	$	50,442

Schedule of Long-Term Investments

The Company’s long-term investments are composed of the following (in thousands):

	June 30, 2020		December 31, 2019
Long-term marketable investments	$	—	$	50,442
Non-marketable investments	9,170		9,750
Total long-term investments	$	9,170	$	60,192

Non-Marketable Investments

The Company’s non-marketable investments are composed of the following (in thousands):

	June 30, 2020		December 31, 2019
Accounted for at cost, adjusted for observable price changes	$	1,750	$	1,750
Accounted for using the equity method	7,420		8,000
Total non-marketable investments	$	9,170	$	9,750