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Note 1 - Nature of the Business and Basis of Preparation (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Subsidiaries [Table Text Block]
   

Percentage of

 
  

Date of

ownership by the

Principal

Name of company

Place of incorporation

incorporation

Company

Activities

BeyondSpring

    

Pharmaceuticals Inc.

Delaware,

   

(“BeyondSpring US ”)

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.

The People’s Republic of China

   

(“Wanchun Shenzhen”)

(“PRC”)

April 23, 2015

100%

Holding company

     

Dalian Wanchunbulin

    

Pharmaceuticals Ltd.

    

(“Wanchunbulin”)

PRC

May 6, 2015

58.0%

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

58.0%

Holding company

     

SEED Therapeutics Inc.

    

(“SEED”)

BVI

June 25, 2019

59.0%

Pre-clinical development activities

     

SEED Technology Limited

    

(“SEED Technology”)

BVI

December 9, 2019

58.0%

Holding company

     

SEED Therapeutics US, Inc.

    

(“SEED US”)

Delaware, U.S.

November 25, 2020

59.0%

Pre-clinical development activities