Property and equipment (Detail) - Property and Equipment (USD $)	Sep. 30, 2012	Sep. 30, 2011
Property and Equipment,Gross	$ 2,092,558	$ 2,089,273
Accumulated depreciation and amortization	(2,082,105)	(2,076,000)
Property and equipment, net	10,453	13,273
Laboratory Equipment [Member]
Property and Equipment,Gross	1,344,273	1,344,273
Computer Hardware and Software [Member]
Property and Equipment,Gross	168,285	165,000
Leasehold Improvements [Member]
Property and Equipment,Gross	$ 580,000	$ 580,000

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References+ Details

Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details

- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details