XML 53 R29.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Note 1 - Nature of the Business Group Internal Restructuring - Schedule of Subsidiaries (Details) | Dec. 31, 2016
--- | ---
BeyondSpring U.S. [Member] |
Equity method investment, ownership percentage | 100.00%
BeyondSpring Ltd. [Member] |
Equity method investment, ownership percentage | 100.00%
BeyondSpring HK [Member] |
Equity method investment, ownership percentage | 100.00%
BVI Biotech [Member] |
Equity method investment, ownership percentage | 100.00%
Wanchun Shenzhen [Member] |
Equity method investment, ownership percentage | 100.00%
Wanchunbulin [Member] |
Equity method investment, ownership percentage | 60.00%
BeyondSpring Australia [Member] |
Equity method investment, ownership percentage | 100.00%

X
- Definition Represents the percentage of ownership in subsidiaries. + References No definition available. + Details
Name: | bysi_OwnershipPercentageInSubsidiaries
Namespace Prefix: | bysi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_OwnershipAxis=bysi_BeyondSpringUSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OwnershipAxis=bysi_BeyondSpringLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OwnershipAxis=bysi_BeyondSpringHKMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OwnershipAxis=bysi_BVIBiotechMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OwnershipAxis=bysi_WanchunShenzhenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OwnershipAxis=bysi_WanchunbulinMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OwnershipAxis=bysi_BeyondSpringAustraliaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |