FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2021

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value

Assets and liabilities measured at fair value on a recurring basis:

	June 30, 2021								December 31, 2020
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash equivalents	$	4,650	$	—	$	—	$	4,650	$	42,339	$	14,000	$	—	$	56,339
Marketable securities	$	—	$	271,459	$	—	$	271,459	$	—	$	293,269	$	—	$	293,269
Capped Call Transactions (1)	$	—	$	90,789	$	—	$	90,789	$	—	$	83,597	$	—	$	83,597
Venture investments (1) (2)	$	—	$	—	$	9,779	$	9,779	$	—	$	—	$	8,345	$	8,345

(1) Included in other long-term assets. (2) Investments in privately-held companies.

Fair value, assets measured on recurring basis, unobservable input reconciliation

Changes in venture investments:

	Six Months Ended June 30,
(in thousands)	2021		2020
January 1,	$	8,345	$	4,871
New investments	500		1,769
Sales of investments	(400)		(1,424)
Changes in foreign exchange rates	14		(50)
Changes in fair value:
included in other income	100		1,374
included in other comprehensive income	1,220		100
June 30,	$	9,779	$	6,640