CONSOLIDATED BALANCE SHEETS (USD $)	Apr. 30, 2012	Apr. 30, 2011
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 811,283	$ 4,879,106
Accounts receivable, net of allowance of $1,507,887 and $1,662,168 at January 31, 2012 and April 30, 2011, respectively	22,343,304	22,474,024
Costs and estimated earnings in excess of billings on uncompleted contracts	1,340,379	4,669,012
Inventory	1,475,266	1,972,905
Prepaid expenses and other current assets	2,142,191	1,413,151
Prepaid income taxes	137,279	173,700
Income taxes receivable		1,166,225
Deferred tax assets	307,550	2,621,329
Total current assets	28,557,252	39,369,452
PROPERTY AND EQUIPMENT, net	4,309,450	6,035,353
OTHER INTANGIBLE ASSETS, net	382,852	803,171
GOODWILL	1,930,826	2,044,856
DEFERRED TAX ASSETS	243,999	2,675,511
OTHER ASSETS	371,020	134,654
Total assets	35,795,399	51,062,997
Current portion of loans payable	143,514	35,724
Income taxes payable	194,963
Borrowings under line of credit	4,964,140	7,000,000
Current portion of capital lease obligations	15,465	54,496
Accounts payable and accrued expenses	16,669,621	10,249,503
Billings in excess of costs and estimated earnings on uncompleted contracts	3,594,193	2,039,117
Deferred revenue	790,270	792,414
Due joint venture partner	3,314,708	3,415,641
Acquisition-related contingent consideration		1,008,200
Total current liabilities	29,686,874	24,595,095
Loans payable, net of current portion	223,561	10,554
Capital lease obligations, net of current portion		15,465
Total liabilities	29,910,435	24,621,114
Preferred stock - $0.0001 par value, 5,000,000 shares authorized, none issued
Common stock - $0.0001 par value, 25,000,000 shares authorized, 6,954,766 shares issued and outstanding at April 30, 2012 and April 30, 2011	695	695
Additional paid-in capital	50,477,543	50,433,626
Accumulated deficit	(47,143,662)	(26,595,831)
Accumulated other comprehensive income on foreign currency translation, net of tax effects of $212,125 and $185,060 at April 30, 2012 and April 30, 2011, respectively	1,433,066	1,564,965
Total WPCS shareholders' equity	4,767,642	25,403,455
Noncontrolling interest	1,117,322	1,038,428
Total equity	5,884,964	26,441,883
Total liabilities and equity	$ 35,795,399	$ 51,062,997