Summary of Significant Accounting Policies (Details 6) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	May 31, 2013	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2013 Ning Xiang	May 31, 2013 Ning Xiang	Jul. 31, 2013 LED production business
Goodwill
Goodwill		$ 59	$ 59		$ 0	$ 59
Goodwill impairment loss	$ 1,100	$ 0	$ 1,077	$ 1,077