1
                                                                 EXHIBIT 12.1

              COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES




                                                                             SIX MONTHS
                                                                               ENDED          
                                FISCAL YEAR ENDED APRIL 30,                  OCTOBER 31,      
                        ----------------------------------------------     ----------------   
                        1993      1994      1995      1996       1997       1996      1997    
                        -----    ------    ------    ------    -------     ------    ------   
                                                                      
Fixed charges
  Interest expense....  $  10    $   21    $   45    $   33    $    75     $   14    $  403   
  Amortization of 
    capitalized
    expenses related
    to indebtedness...     --        --        --        --         --         --        --   
                        -----    ------    ------    ------    -------     ------    ------   
TOTAL FIXED
  CHARGES.............  $  10    $   21    $   45    $   33    $    75     $   14    $  403   
                        =====    ======    ======    ======    =======     ======    ======   
Income from
  continuing
  operations before
  taxes...............     (6)      337     2,483     7,086     14,354      5,562     5,433   
Fixed charges.........     10        21        45        33         75         14       403   
                        -----    ------    ------    ------    -------     ------    ------   
TOTAL EARNINGS........  $   4    $  358    $2,528    $7,119    $14,429     $5,576    $5,836   
                        =====    ======    ======    ======    =======     ======    ======   
RATIO OF EARNINGS TO
  FIXED CHARGES.......   0.40     17.05     56.18    215.73     192.39     398.29     14.48   



                                  PRO FORMA               PRO FORMA            PRO FORMA           
                                 FISCAL YEAR           SIX MONTH PERIOD     SIX MONTH PERIOD       
                                ENDED APRIL 30,        ENDED OCTOBER 31,    ENDED OCTOBER 31,      
                                     1997                   1996                 1997              
                                ---------------        ----------------       --------------       
                                                                                       
Fixed charges                                                                                      
  Interest expense....              $10,369                 $5,184               $5,184            
  Amortization of                                                                                  
    capitalized                                                                                    
    expenses related                                                                               
    to indebtedness...                  734                    367                  367            
                                    -------                 ------               ------            
TOTAL FIXED                                                                                        
  CHARGES.............              $11,103                 $5,551               $5,551            
                                    =======                 ======               ======            
Income from                                                                                        
  continuing                                                                                       
  operations before                                                                                
  taxes...............                3,930                    (96)                 156            
Fixed charges.........               11,103                  5,551                5,551            
                                    -------                 ------               ------            
TOTAL EARNINGS........              $15,033                 $5,455               $5,707            
                                    =======                 ======               ======            
RATIO OF EARNINGS TO                                                                               
  FIXED CHARGES.......                 1.35                    .98                 1.03