Note 8 - Accounts Payable and Accrued Expenses (Details) - USD ($)	Jan. 31, 2018	Apr. 30, 2017
Details
Commission payable	$ 201,310	$ 133,712
General liability, worker's compensation, and medical insurance payable	575,687	465,505
Consulting fee payable	209,905	266,852
Union and education fees payable	297,754	280,404
Interest payables for short-term loans	521,012	213,153
Advanced from the employees	602,037	172,435
Other miscellaneous payables	$ 203,551	$ 2,959