Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

Summary of Remaining Aggregate Potential Milestone Payments Payable Based on Achievement of Net Sales Thresholds

The remaining aggregate potential milestone payments of $225.0 million are payable based on certain TEPEZZA worldwide net sales thresholds being achieved as noted in the following table:  

TEPEZZA Worldwide Net Sales Threshold	Milestone Payment
>$250 million	$50 million
>$375 million	$75 million
>$500 million	$100 million