Note 1 - Nature of the Business (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Subsidiaries [Table Text Block]

Name of company	Place of incorporation	Date of incorporation	Percentage of ownership by the Company	Principal activities
BeyondSpring Pharmaceuticals Inc. (“BeyondSpring US”)	Delaware, United States of America (“U.S.”)	June 18, 2013	100%	Clinical trial activities
BeyondSpring Ltd.	The British Virgin Islands (“BVI”)	December 3, 2014	100%	Holding company
BeyondSpring (HK) Limited (“BeyondSpring HK”)	Hong Kong	January 13, 2015	100%	Holding company
Wanchun Biotechnology Limited (“BVI Biotech”)	BVI	April 1, 2015	100%	Holding company
Wanchun Biotechnology (Shenzhen) Ltd. (“Wanchun Shenzhen”)	The People’s Republic of China (“PRC”)	April 23, 2015	100%	Holding company
Dalian Wanchunbulin Pharmaceuticals Ltd. (“Wanchunbulin”)	PRC	May 6, 2015	60%	Clinical trial activities
BeyondSpring Pharmaceuticals Australia PTY Ltd. (“BeyondSpring Australia”)	Australia	March 3, 2016	100%	Clinical trial activities
Beijing Wanchun Pharmaceutical Technology Ltd. (“Beijing Wanchun”)	PRC	May 21, 2018	60%	Clinical trial activities