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Note 1 - Nature of the Business Group Internal Restructuring (Tables) | 12 Months Ended
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Dec. 31, 2016
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

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