XML 32 R23.htm IDEA: XBRL DOCUMENT
v3.25.1

Note 1 - Nature of the Business and the Basis of Preparation (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
Notes Tables |
Schedule of Subsidiaries [Table Text Block] |
Name of company | Place of incorporation | Date of incorporation |  | Percentage of ownership by the Group |  | Principal activities
BeyondSpring Pharmaceuticals Inc. (“BeyondSpring US”) | Delaware, 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 (Dalian) Ltd. (“Wanchun Dalian”) | People’s Republic of China (“PRC”) | April 23, 2015 |  |  | 100% |  | Holding company
Dalian Wanchunbulin Pharmaceuticals Ltd. (“Wanchunbulin”) | PRC | May 6, 2015 |  |  | 57.97% |  | Clinical trial activities
Beijing Wanchun Pharmaceutical Technology Ltd. (“Beijing Wanchun”) | PRC | May 21, 2018 |  |  | 57.97% |  | Holding company
SEED Therapeutics Inc. (“SEED”) | BVI | June 25, 2019 |  |  | 37.56% |  | Pre-clinical development activities
SEED Technology Limited (“SEED Technology”) | BVI | December 9, 2019 |  |  | 57.97% |  | Holding company
SEED Therapeutics US, Inc. (“SEED US”) | Delaware, U.S. | November 25, 2020 |  |  | 37.56% |  | Pre-clinical development activities
Wanchun Hongji (Dalian) Pharmaceuticals Ltd. (“Wanchun Hongji”) | PRC | March 22, 2022 |  |  | 37.56% |  | Pre-clinical development activities

X
- Definition A tabular disclosure of ownership percentage of subsidiaries of the company. + References No definition available. + Details
Name: | bysi_ScheduleOfSubsidiariesTableTextBlock
Namespace Prefix: | bysi_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration