INCOME TAXES: (Details Textual) (USD $)	1 Months Ended	12 Months Ended
	Oct. 31, 2012	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Operating Loss Carry Forwards State		$ 97,943,000
Operating Loss Carryforwards State Expiration Dates Description		The remaining net operating loss carryforwards expire beginning in the fiscal years ending April 30, 2014 through April 30, 2034.
Operating Loss Carryforwards State Subject To Expiration Current		6,000
Operating Loss Carryforwards State Subject To Expiration In One Years		954,000
Operating Loss Carryforwards State Subject To Expiration In Two Years		729,000
Operating Loss Carryforwards State Subject To Expiration In Three Years		2,468,000
Operating Loss Carryforwards State Subject To Expiration In Four Years		939,000
Operating Loss Carryforwards State Subject To Expiration In Thereafter		92,847,000
Federal Opearting Loss Carryforwards		16,500,000
Federal Operating Loss Carryforwards Acquired		5,000,000
Tax Credit Adjustments		37,000	55,000
Business Acquisition Purchase Price Allocation Goodwill		12,606,000
Payment For Taxes On Investment Assets	597,000
Interest Accrued	33,000
Accrued Deferred Tax Liability	589,000
Actual tax provision (benefit)	41,000	(1,759,000)	(896,000)	(3,212,000)
Adjustment for unrecognized tax benefits		1,516,000	1,741,000	2,384,000
Interest Liability On Unrecognized Tax Benefits		$ 134,000	$ 171,000