Note 8 - Accounts Payable and Accrued Expenses: Schedule of Accounts Payable and Accrued Liabilities (Details) - USD ($)	Jan. 31, 2018	Apr. 30, 2017
Details
Accounts Payable	$ 6,623,798	$ 5,096,599
Customer Advances, Current	177,666	40,900
Accrued salary payable	359,610	160,244
Taxes Payable, Current	92,568	121,127
Deferred Revenue	25,719	82,581
Accounts Payable, Other, Current	2,611,256	1,535,020
Accounts Payable and Accrued Liabilities, Current	$ 9,890,617	$ 7,036,471