ACCRUED EXPENSES

3 Months Ended

Mar. 31, 2020

Payables And Accruals [Abstract]

ACCRUED EXPENSES

10. ACCRUED EXPENSES

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

	As of March 31, 2020		As of December 31, 2019
	(in thousands)
Product revenue related reserves	$	46,721	$	45,249
Accrued contract manufacturing costs		26,098		27,622
Accrued clinical and pre-clinical costs		20,292		18,010
Accrued employee compensation costs		18,993		43,240
Accrued Roche transaction costs		15,577		—
Accrued professional fees		11,219		10,707
Accrued milestone expense		8,893		18,390
Accrued royalties		6,400		6,301
Accrued property and equipment		5,887		1,181
Accrued collaboration cost sharing		4,821		9,000
Accrued interest expense		3,183		1,045
Other		8,214		4,782
Total accrued expenses	$	176,298	$	185,527