Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2017

Related Party Transactions [Abstract]

Schedule of Major Related Party and Relationship

The table below sets forth the major related party and the relationship with the Group as of December 31, 2017:

Company Name	Relationship with the Group
Quan Venture Fund I, L.P.	Significantly influenced by Samantha Du, founder, chairman and CEO of the Company
Qiagen (Suzhou) Translational Medicine Co., Ltd.	Significant influence held by Samantha Du’s immediate family

Schedule of Transactions Between Related Party

The Group paid expenditures to its related party:

Research and development expenditures	Year ended December 31,
	2015		2016		2017
	$		$		$
Qiagen (Suzhou) Translational Medicine Co. Ltd.		96,656		—		—