ACCRUED EXPENSES

12 Months Ended

Dec. 31, 2019

Payables And Accruals [Abstract]

ACCRUED EXPENSES

12. ACCRUED EXPENSES

The following table summarizes the Company’s accrued expenses for each of the periods indicated:

	As of December 31,
	2019		2018
	(in thousands)
Product revenue related reserves	$	45,249	$	26,146
Accrued employee compensation costs		43,240		24,692
Accrued contract manufacturing costs		27,622		15,794
Accrued milestone expense		18,390		24,020
Accrued clinical and pre-clinical costs		18,010		11,396
Accrued professional fees		10,707		11,319
Accrued collaboration cost-sharing		9,000		2,167
Accrued royalties		6,301		8,254
Other		7,008		10,307
Total accrued expenses	$	185,527	$	134,095