5. PROPERTY

3 Months Ended

Jul. 31, 2011

Property, Plant and Equipment Disclosure [Text Block]

5.  PROPERTY

Property, net consists of the following at July 31, 2011 and April 30, 2011:

	July 31, 2011			April 30, 2011
Leasehold improvements	$	1,068,000		$	932,000
Laboratory equipment		4,441,000			4,391,000
Furniture, fixtures, office equipment and software		2,062,000			1,814,000
		7,571,000			7,137,000
Less accumulated depreciation and amortization		(5,130,000	)		(4,928,000	)
Property, net	$	2,441,000		$	2,209,000

Depreciation and amortization expense for three months ended July 31, 2011 and 2010 was $203,000 and $138,000, respectively.