SHAREHOLDERS' EQUITY (Details Textual) (USD $)	3 Months Ended				0 Months Ended		1 Months Ended		3 Months Ended	1 Months Ended		3 Months Ended		3 Months Ended				3 Months Ended				3 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Apr. 30, 2012	Apr. 15, 2010 Shelf Registration [Member]	Mar. 08, 2010 Stockholder Rights Plan [Member]	Mar. 08, 2010 Stockholder Rights Plan [Member] Series D Preferred Stock [Member]	Apr. 30, 2006 Special Situations Fund [Member]	Jan. 30, 2006 Special Situations Fund [Member]	Jul. 31, 2012 Special Situations Fund [Member]	Jan. 30, 2006 Minimum [Member] Special Situations Fund [Member]	Jan. 30, 2006 Maximum [Member] Special Situations Fund [Member]	Jul. 31, 2012 Incentive Stock Plan 2007 [Member]	Sep. 30, 2006 Incentive Stock Plan 2007 [Member]	Jul. 31, 2012 Incentive Stock Plan 2007 [Member] Minimum [Member]	Jul. 31, 2012 Incentive Stock Plan 2007 [Member] Maximum [Member]	Jul. 31, 2012 Incentive Stock Plan 2006 [Member]	Sep. 30, 2005 Incentive Stock Plan 2006 [Member]	Jul. 31, 2012 Incentive Stock Plan 2006 [Member] Minimum [Member]	Jul. 31, 2012 Incentive Stock Plan 2006 [Member] Maximum [Member]	Jul. 31, 2012 Stock Option Plan 2002 [Member]	Mar. 31, 2003 Stock Option Plan 2002 [Member]	Jul. 31, 2012 Stock Option Plan 2002 [Member] Minimum [Member]	Jul. 31, 2012 Stock Option Plan 2002 [Member] Maximum [Member]
Common Stock, Capital Shares Reserved for Future Issuance				2,314,088									400,000				400,000				416,667
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period														1 year	3 years			1 year	3 years			1 year	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Contractual Term												5 years				5 years				5 years
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options												176,500				1,000				49,936
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price																$ 6.33
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit												$ 2.37								$ 0.84
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant												211,000				327,424				224,214
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	10,000
Stock-based compensation	$ 7,526	$ 20,288
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options	7,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	7 months
Stock Sold by Former Stockholder in Violation of Securities Exchange Act								143,120
Stock Sold by Former Stockholder in Violation of Securities Exchange Act										$ 9.18	$ 12.62
Stock Purchased by Former Stockholder in Violation of Securities Exchange Act							666,468
Price per Common Stock Purchased by Former Stockholder in Violation of Securities Exchange Act							$ 7.00
Beneficial Ownership of Common Stock							more than 10%
Amount Agreed to be Settled to Company									529,280
Legal Fees									272,539
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit												$ 6.33								$ 10.25
Section 16(b) settlement	$ 254,361								$ 254,361
Purchase Of Stock Description						one one-thousandth (1/1000th)
Preferred stock, par value	$ 0.0001		$ 0.0001	$ 0.0001		$ 0.0001
Stock Purchase Price						$ 15.00
Accumulating Beneficial Ownership					15% or more