CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2012	Jan. 31, 2011
Statement of Income and Comprehensive Income [Abstract]
Consolidated net loss	$ (10,282,499)	$ (3,321,256)	$ (11,922,444)	$ (9,725,893)
Other comprehensive income (loss) - foreign currency translation adjustments, net of tax effects of $8,187, $10,147, $27,068 and $32,837, respectively	46,730	181,611	(92,891)	536,163
Comprehensive loss	(10,235,769)	(3,139,645)	(12,015,335)	(9,189,730)
Comprehensive income attributable to noncontrolling interest	42,857	149,426	117,576	101,522
Comprehensive loss attributable to WPCS	$ (10,278,626)	$ (3,289,071)	$ (12,132,911)	$ (9,291,252)