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SHAREHOLDERS' EQUITY (Details 1) (USD $)
 12 Months Ended
Apr. 30, 2014
Apr. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number Of Shares, Outstanding, May 1, 2013 116,279  
Number Of Shares, Granted 1,760  
Number Of Shares, Outstanding, April 30, 2014 79,207 116,279
Weighted-average, Exercise Price, Outstanding, May 1, 2013 $ 6.70  
Weighted-average, Exercise Price, Outstanding, April 30, 2014 $ 5.23 $ 6.70
Weighted- average Remaining Contractual Term, Outstanding, April 30, 2014 3 years 3 months 3 years 10 months 17 days
2002 Plan [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number Of Shares, Outstanding, May 1, 2013 15,779  
Number Of Shares, Granted 0  
Number Of Shares, Exercised 0  
Number Of Shares, Forfeited/Expired (3,143)  
Number Of Shares, Outstanding, April 30, 2014 12,636  
Number Of Shares, Vested and expected to vest, April 30, 2014 12,636  
Weighted-average, Exercise Price, Outstanding, May 1, 2013 $ 7.56  
Weighted-average, Exercise Price, Granted $ 0.00  
Weighted-average, Exercise Price, Exercised $ 0.00  
Weighted-average, Exercise Price, Forfeited/Expired $ 11.60  
Weighted-average, Exercise Price, Outstanding, April 30, 2014 $ 6.58  
Weighted-average, Exercise Price, Vested and expected to vest, April 30, 2014 $ 6.58  
Weighted- average Remaining Contractual Term, Outstanding, April 30, 2014 3 years  
Weighted- average Remaining Contractual Term, Vested and expected to vest, April 30, 2014 3 years  
Aggregate Intrinsic Value, Outstanding, April 30, 2014 $ 0  
Aggregate Intrinsic Value, Vested and expected to vest, April 30, 2014 0  
2006 Plan [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number Of Shares, Outstanding, May 1, 2013 46,571  
Number Of Shares, Granted 340  
Number Of Shares, Exercised 0  
Number Of Shares, Forfeited/Expired (21,769)  
Number Of Shares, Outstanding, April 30, 2014 25,142  
Number Of Shares, Vested and expected to vest, April 30, 2014 25,142  
Weighted-average, Exercise Price, Outstanding, May 1, 2013 $ 4.19  
Weighted-average, Exercise Price, Granted $ 3.55  
Weighted-average, Exercise Price, Exercised $ 0.00  
Weighted-average, Exercise Price, Forfeited/Expired $ 4.25  
Weighted-average, Exercise Price, Outstanding, April 30, 2014 $ 4.19  
Weighted-average, Exercise Price, Vested and expected to vest, April 30, 2014 $ 4.19  
Weighted- average Remaining Contractual Term, Outstanding, April 30, 2014 3 years 4 months 24 days  
Weighted- average Remaining Contractual Term, Vested and expected to vest, April 30, 2014 3 years 4 months 24 days  
Aggregate Intrinsic Value, Outstanding, April 30, 2014 0  
Aggregate Intrinsic Value, Vested and expected to vest, April 30, 2014 0  
2007 Plan [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number Of Shares, Outstanding, May 1, 2013 53,929  
Number Of Shares, Granted 1,420  
Number Of Shares, Exercised 0  
Number Of Shares, Forfeited/Expired (13,920)  
Number Of Shares, Outstanding, April 30, 2014 41,429  
Number Of Shares, Vested and expected to vest, April 30, 2014 41,429  
Weighted-average, Exercise Price, Outstanding, May 1, 2013 $ 8.60  
Weighted-average, Exercise Price, Granted $ 3.55  
Weighted-average, Exercise Price, Exercised $ 0.00  
Weighted-average, Exercise Price, Forfeited/Expired $ 19.15  
Weighted-average, Exercise Price, Outstanding, April 30, 2014 $ 5.45  
Weighted-average, Exercise Price, Vested and expected to vest, April 30, 2014 $ 5.45  
Weighted- average Remaining Contractual Term, Outstanding, April 30, 2014 3 years 2 months 12 days  
Weighted- average Remaining Contractual Term, Vested and expected to vest, April 30, 2014 3 years 2 months 12 days  
Aggregate Intrinsic Value, Outstanding, April 30, 2014 0  
Aggregate Intrinsic Value, Vested and expected to vest, April 30, 2014 $ 0