INTANGIBLE ASSETS AND GOODWILL - Schedule of Finite Lived Intangible Assets Net Balances and Weighted Average Useful Lives (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 959,895	$ 963,690
Less: Accumulated amortization	(88,441)	(20,411)
Intangibles, net	871,454	943,279
Finite-lived and indefinite-lived intangible assets, gross	960,101	1,163,961
Finite-lived and indefinite-lived intangible assets, net	871,660	1,143,550
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets		200,000
Acquired developed technology
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 206	$ 271
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted-average remaining useful life of finite-lived intangible asset (in years)	15 years 2 months 12 days	15 years 10 months 24 days
Finite-lived intangible assets, gross	$ 100,700	$ 100,700
Less: Accumulated amortization	(5,683)	(961)
Intangibles, net	$ 95,017	$ 99,739
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-average remaining useful life of finite-lived intangible asset (in years)	13 years 1 month 6 days	13 years 7 months 6 days
Finite-lived intangible assets, gross	$ 2,700	$ 2,700
Less: Accumulated amortization	(359)	(224)
Intangibles, net	$ 2,341	$ 2,476
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted-average remaining useful life of finite-lived intangible asset (in years)	4 years	8 years 9 months 18 days
Finite-lived intangible assets, gross	$ 10,441	$ 22,690
Less: Accumulated amortization	(5,089)	(5,974)
Intangibles, net	$ 5,352	$ 16,716
Acquired developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted-average remaining useful life of finite-lived intangible asset (in years)	9 years 2 months 12 days	9 years 10 months 24 days
Finite-lived intangible assets, gross	$ 814,171	$ 806,371
Less: Accumulated amortization	(73,022)	(12,345)
Intangibles, net	$ 741,149	$ 794,026
Supply agreements
Finite-Lived Intangible Assets [Line Items]
Weighted-average remaining useful life of finite-lived intangible asset (in years)	6 years 9 months 18 days	7 years 6 months
Finite-lived intangible assets, gross	$ 30,000	$ 30,000
Less: Accumulated amortization	(3,538)	(571)
Intangibles, net	$ 26,462	$ 29,429
Internally developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted-average remaining useful life of finite-lived intangible asset (in years)	2 years 4 months 24 days	2 years 6 months
Finite-lived intangible assets, gross	$ 1,883	$ 1,229
Less: Accumulated amortization	(750)	(336)
Intangibles, net	$ 1,133	$ 893