RETIREMENT PLANS (Details) - International Brotherhood Of Electrical Workers District No9 Pension Plan [Member]	12 Months Ended
Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2015
Multiemployer Plans [Line Items]
Federal Identification Number	93-6074829
Pension Certified Zone Status		Green	Green
FIP/RP Status Pending or Implemented	No
Expiration of Collective Bargaining Arrangement	11/30/2017

Indicate the multiemployer plan's certified zone status as currently required by the Pension Protection Act of 2006 or a subsequent amendment thereof. The zone status categories are red (critical status), orange (seriously endangered), yellow (endangered), and green (none of the above). The acceptable values are "red", "orange", "yellow", "green", "other", and "NA". A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

No definition available.

Name:	wpcs_MultiEmployerPlanCertifiedZoneStatus
Namespace Prefix:	wpcs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration