Accounts receivable, net and other receivables (Tables)

12 Months Ended

Dec. 31, 2020

Accounts receivable, net and other receivables

Schedule of other current receivables

	As of December 31
(in thousands)	2019		2020
Receivables from collaborative arrangments	$	—	$	2,426
Research premium		1,530		1,308
Other receivables		1,214		175
Total accounts receivable, net and other receivables	$	2,744	$	3,909