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Inventories - Components of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Inventory [Line Items]
Raw materials	$ 6,591	$ 7,170
Work-in-process	5,989	8,585
Total	38,133	34,835
Illumigene instruments [Member]
Inventory [Line Items]
Finished goods	2,694	1,980
Kits and reagents [Member]
Inventory [Line Items]
Finished goods	$ 22,859	$ 17,100

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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