Major Suppliers (Details)	3 Months Ended
	Aug. 31, 2012	Aug. 31, 2011
Percetage of purchase from major suppliers
Percentage of purchases from major suppliers	32.00%	18.00%
WUXI Streamtek Ltd. [Member]
Percetage of purchase from major suppliers
Percentage of purchases from major suppliers	19.00%	10.00%
Aotco Metal Finishing [Member]
Percetage of purchase from major suppliers
Percentage of purchases from major suppliers	13.00%
Platronics Seals [Member]
Percetage of purchase from major suppliers
Percentage of purchases from major suppliers		8.00%