Reportable Segment and Major Concentrations Data - Segment Information (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012 Tennessee Facility [Member]	Sep. 30, 2011 Diagnostics [Member]	Sep. 30, 2011 Life Science [Member]
Sales Information [Line Items]
Consolidation of Maine operations into Tennessee facility	$ 1,013		$ 1,057
Sales and marketing leadership reorganization costs		$ 1,240