v3.26.1
Note 1 - Nature of the Business and the Basis of Preparation - Schedule of Subsidiaries (Details)
Mar. 31, 2026
Jan. 31, 2025
BeyondSpring Pharmaceuticals Inc. [Member]
Ownership Percentage in Subsidiaries
100.00%
BeyondSpring Ltd. [Member]
Ownership Percentage in Subsidiaries
100.00%
BeyondSpring HK [Member]
Ownership Percentage in Subsidiaries
100.00%
Wanchun Biotechnology Limited [Member]
Ownership Percentage in Subsidiaries
100.00%
Wanchun Biotechnology (Dalian) Ltd. [Member]
Ownership Percentage in Subsidiaries
100.00%
Dalian Wanchunbulin Pharmaceuticals Ltd. (“Wanchunbulin”) [Member]
Ownership Percentage in Subsidiaries
57.97%
Beijing Wanchun Pharmaceutical Technology Ltd. [Member]
Ownership Percentage in Subsidiaries
57.97%
SEED Therapeutics Inc. [Member]
Ownership Percentage in Subsidiaries
36.51%
13.62%
SEED Technology Limited [Member]
Ownership Percentage in Subsidiaries
57.97%
SEED Therapeutics US, Inc. [Member]
Ownership Percentage in Subsidiaries
36.51%
Wanchun Hongji (Dalian) Pharmaceuticals Ltd. [Member]
Ownership Percentage in Subsidiaries
36.51%
SEED LH Inc. [Member]
Ownership Percentage in Subsidiaries
36.51%
SEED LH MG Inc. [Member]
Ownership Percentage in Subsidiaries
36.51%
X
- Definition
Represents the percentage of ownership in subsidiaries.
+ References
No definition available.
+ Details
Name:
bysi_OwnershipPercentageInSubsidiaries
Namespace Prefix:
bysi_
Data Type:
dtr-types:percentItemType
Balance Type:
na
Period Type:
instant
X
- Details
Name:
srt_OwnershipAxis=bysi_BeyondSpringPharmaceuticalsIncMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_BeyondSpringLtdMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_BeyondSpringHKMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_WanchunBiotechnologyLimitedMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_WanchunBiotechnologyDalianLtdMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_DalianWanchunbulinPharmaceuticalsLtdWanchunbulinMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_BeijingWanchunPharmaceuticalTechnologyLtdMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_SEEDTherapeuticsIncMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_SEEDTechnologyLimitedMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_SeedTherapeuticsUSIncMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_WanchunHongjiDalianPharmaceuticalsLtdMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_SEEDLHIncMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
srt_OwnershipAxis=bysi_SEEDLHMGIncMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type: