9. INCOME TAXES (Tables)

12 Months Ended

Apr. 30, 2013

Income Tax Disclosure [Abstract]

Provision for income taxes

	2013			2012			2011
Provision for federal income taxes at statutory rate	$	(10,125,000	)	$	(14,321,000	)	$	(11,611,000	)
State income taxes, net of federal benefit		2,000			20,000			(406,000	)
Expiration and adjustment of loss carry forwards		(98,263,000	)		13,980,000			9,174,000
Change in valuation allowance		108,310,000			(95,000	)		2,294,000
Other, net		76,000			416,000			549,000
Income tax (expense) benefit	$	–		$	–		$	–

Deferred income taxes

	2013			2012
Share-based compensation	$	4,624,000		$	3,494,000
Deferred revenue		1,912,000			1,719,000
Depreciation and amortization		668,000			623,000
Accrued liabilities		1,677,000			693,000
Net operating losses		105,958,000			–
Total deferred tax assets		114,839,000			6,529,000
Less valuation allowance		(114,839,000	)		(6,529,000	)
Net deferred tax assets	$	–		$	–