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Note 5 - Related Party Transactions - Due To Related Parties (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Due to related parties | $ 210 | $ 432
Dr. Lan Huang [Member] |  |
Due to related parties | 210 | 386
Wanchun Biotech1 [Member] |  |
Due to related parties |  | $ 46

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