Percentage of Consolidated Revenues Attributed To Customers (Detail) (Sales)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fine Chemicals Customer One
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	45.00%	26.00%	39.00%	30.00%
Fine Chemicals Customer Two
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		13.00%	10.00%	11.00%
Specialty Chemicals Customer
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		25.00%		20.00%
Specialty Chemicals Customer Two
Revenue, Major Customer [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	24.00%		20.00%	12.00%