SHAREHOLDERS' EQUITY (Details Textual) (USD $)	0 Months Ended	9 Months Ended			0 Months Ended	1 Months Ended		9 Months Ended	1 Months Ended		9 Months Ended		9 Months Ended				9 Months Ended				9 Months Ended
	Dec. 04, 2012	Jan. 31, 2013	Jan. 31, 2012	Apr. 30, 2012	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]	Jan. 31, 2012 Special Situations Fund [Member]	Jan. 30, 2006 Minimum [Member] Special Situations Fund [Member]	Jan. 30, 2006 Maximum [Member] Special Situations Fund [Member]	Jan. 31, 2013 Incentive Stock Plan 2007 [Member]	Sep. 30, 2006 Incentive Stock Plan 2007 [Member]	Jan. 31, 2013 Incentive Stock Plan 2007 [Member] Minimum [Member]	Jan. 31, 2013 Incentive Stock Plan 2007 [Member] Maximum [Member]	Jan. 31, 2013 Incentive Stock Plan 2006 [Member]	Sep. 30, 2005 Incentive Stock Plan 2006 [Member]	Jan. 31, 2013 Incentive Stock Plan 2006 [Member] Minimum [Member]	Jan. 31, 2013 Incentive Stock Plan 2006 [Member] Maximum [Member]	Jan. 31, 2013 Stock Option Plan 2002 [Member]	Mar. 31, 2003 Stock Option Plan 2002 [Member]	Jan. 31, 2013 Stock Option Plan 2002 [Member] Minimum [Member]	Jan. 31, 2013 Stock Option Plan 2002 [Member] Maximum [Member]
Common Stock, Capital Shares Reserved for Future Issuance												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											363,500				326,000				112,700
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price																	$ 0.60	$ 6.33			$ 0.60	$ 6.33
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant											24,000				2,424				0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures		615,000
Stock-based compensation		$ 102,673	$ 59,413
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options		3,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition		5 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	100,000							272,539
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit											$ 6.33								$ 6.33
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
Stock Purchase Price					$ 15.00