11. SEGMENT REPORTING (Details 1)	3 Months Ended		6 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
United States (Customer A)
Customer revenue as a percentage of revenue	97.00%	15.00%	90.00%	29.00%
United States (Customer B)
Customer revenue as a percentage of revenue	0.00%	23.00%	0.00%	10.00%
Germany (1 Customer)
Customer revenue as a percentage of revenue	0.00%	56.00%	0.00%	24.00%
Denmark (1 Customer)
Customer revenue as a percentage of revenue	0.00%	5.00%	1.00%	36.00%
Other Customers
Customer revenue as a percentage of revenue	3.00%	1.00%	9.00%	1.00%
Total
Customer revenue as a percentage of revenue	100.00%	100.00%	100.00%	100.00%