5. PROPERTY

9 Months Ended

Jan. 31, 2013

Property

5. PROPERTY

Property, net consists of the following at January 31, 2013 and April 30, 2012:

	January 31, 2013			April 30, 2012
Leasehold improvements	$	1,383,000		$	1,383,000
Laboratory equipment		5,339,000			4,967,000
Furniture, fixtures, office equipment and software		2,553,000			2,287,000
		9,275,000			8,637,000
Less accumulated depreciation and amortization		(6,492,000	)		(5,737,000	)
Property, net	$	2,783,000		$	2,900,000

Depreciation and amortization expense for three and nine months ended January 31, 2013 was $280,000 and $806,000, respectively, and $238,000 and $664,000 for the three and nine months ended January 31, 2012, respectively.