CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Jan. 31, 2012	Apr. 30, 2011
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 1,746,624	$ 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	22,232,336	22,474,024
Costs and estimated earnings in excess of billings on uncompleted contracts	2,053,250	4,669,012
Inventory	1,229,217	1,972,905
Prepaid expenses and other current assets	1,896,727	1,413,151
Prepaid income taxes	210,024	173,700
Income taxes receivable	50,158	1,166,225
Deferred tax assets	230,400	2,621,329
Total current assets	29,648,736	39,369,452
PROPERTY AND EQUIPMENT, net	4,869,828	6,035,353
OTHER INTANGIBLE ASSETS, net	617,669	803,171
GOODWILL	1,988,186	2,044,856
DEFERRED TAX ASSETS		2,675,511
OTHER ASSETS	570,032	134,654
Total assets	37,694,451	51,062,997
Current portion of loans payable	153,243	35,724
Borrowings under line of credit	3,103,830	7,000,000
Current portion of capital lease obligations	26,178	54,496
Accounts payable and accrued expenses	12,288,104	10,249,503
Billings in excess of costs and estimated earnings on uncompleted contracts	3,248,558	2,039,117
Deferred revenue	895,727	792,414
Due joint venture partner	3,094,682	3,415,641
Acquisition-related contingent consideration		1,008,200
Total current liabilities	22,810,322	24,595,095
Loans payable, net of current portion	249,994	10,554
Capital lease obligations, net of current portion		15,465
Deferred tax liabilities	148,174
Total liabilities	23,208,490	24,621,114
COMMITMENTS AND CONTINGENCIES
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 January 31, 2012 and April 30, 2011	695	695
Additional paid-in capital	50,493,039	50,433,626
Accumulated deficit	(38,614,835)	(26,595,831)
Accumulated other comprehensive income on foreign currency translation, net of tax effects of $212,125 and $185,060 at January 31, 2012 and April 30, 2011, respectively	1,451,058	1,564,965
Total WPCS shareholders' equity	13,329,957	25,403,455
Noncontrolling interest	1,156,004	1,038,428
Total equity	14,485,961	26,441,883
Total liabilities and equity	$ 37,694,451	$ 51,062,997