Note 11 - Income Taxes (Details)	Apr. 30, 2017 USD ($)
Details
Net operating loss ('NOL') carry forward US	$ 11,127,000
Net operating loss ('NOL') carry forward PRC	$ 21,119,000

Represents the monetary amount of Net operating loss ('NOL') carry forward PRC, as of the indicated date.

No definition available.

Name:	fil_NetOperatingLossNOLCarryForwardPRC
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant