11. SEGMENT REPORTING (Details 1)	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Customer revenue as a percentage of revenue	100.00%	100.00%	100.00%
United States (Customer A)
Customer revenue as a percentage of revenue	81.00%	44.00%	56.00%
United States (Customer B)
Customer revenue as a percentage of revenue	17.00%	0.00%	0.00%
Germany (1 Customer)
Customer revenue as a percentage of revenue	0.00%	17.00%	24.00%
Denmark (1 Customer)
Customer revenue as a percentage of revenue	0.00%	25.00%	19.00%
Other Customers
Customer revenue as a percentage of revenue	2.00%	14.00%	1.00%