Subsequent Event (Details)	Jul. 02, 2012
Minimum [Member]
Subsequent Event (Textual) [Abstract]
Environmental test equipment rental business, winding up period	3 months
Tenure of selling off rental equipment assets	6 months
Maximum [Member]
Subsequent Event (Textual) [Abstract]
Environmental test equipment rental business, winding up period	12 months
Tenure of selling off rental equipment assets	12 months