12. SELECTED QUARTERLY FINANCIAL DATA (Tables)

12 Months Ended

Apr. 30, 2013

Quarterly Financial Information Disclosure [Abstract]

Selected quarterly financial information for each of the two most recent fiscal

	Quarter Ended
	April 30,			January 31,			October 31,			July 31,			April 30,			January 31,			October 31,			July 31,
	2013			2013			2012			2012			2012			2012			2011			2011
Net revenues	$	4,254,000		$	7,039,000		$	6,139,000		$	4,251,000		$	2,065,000		$	3,281,000		$	4,242,000		$	5,655,000
Gross profit (a)	$	959,000		$	3,310,000		$	2,358,000		$	2,111,000		$	1,053,000		$	719,000		$	436,000		$	2,422,000
Loss from operations...	$	(8,463,000	)	$	(5,161,000	)	$	(7,057,000	)	$	(7,671,000	)	$	(10,890,000	)	$	(11,093,000	)	$	(12,036,000	)	$	(8,051,000	)
Net loss (b)	$	(8,449,000	)	$	(4,914,000	)	$	(8,753,000	)	$	(7,664,000	)	$	(10,882,000	)	$	(11,090,000	)	$	(12,055,000	)	$	(8,092,000	)
Basic and diluted loss per common share	$	(0.06	)	$	(0.04	)	$	(0.08	)	$	(0.07	)	$	(0.10	)	$	(0.13	)	$	(0.16	)	$	(0.11	)

(a)	Gross profit represents contract manufacturing revenue less cost of contract manufacturing.
(b)	Net loss for the quarter ended October 31, 2012, included a loss on the early extinguishment of debt of $1,696,000 (Note 4).