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Note 4 - Related Party Transactions | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Related Party Transactions Disclosure [Text Block] |
| 4. | Related party transactions
In addition to transactions disclosed elsewhere in the consolidated financial statements, the related party transactions for the years presented were as follows: Dr. Lan Huang Dr. Lan Huang provided consulting services to BeyondSpring US at a fee of $300, $75 and nil for the years ended December 31, 2015, 2016 and 2017, respectively. Wanchun Biotech as a noncontrolling shareholder On November 28, 2016 and January 13, 2017, Wanchunbulin entered into purchase contracts with Wanchun Biotech to purchase drugs from Wanchun Biotech for clinical research purpose. During the years ended December 31, 2016 and 2017, Wanchun Biotech purchased drugs amounting to $110 ( RMB754 ) and $547 ( RMB3,770 ) from third party vendors and sold to Wanchunbulin without any margin, respectively. Due to related parties consisted of the following:
|  | December 31, |
|  | 2016 |  |  | 2017 |
Due to Dr. Lan Huang |  |  | 210 |  |  |  | - |

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- Definition The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -URI http://asc.fasb.org/topic&trid=2122745 + Details
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