<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>                     <C>
<C>
<PERIOD-TYPE>                   6-MOS                   9-MOS                   YEAR                   3-MOS
6-MOS
<FISCAL-YEAR-END>                          MAR-31-1997             MAR-31-1997             MAR-31-1997             MAR-31-1998
             MAR-31-1998
<PERIOD-START>                             APR-01-1996             APR-01-1996             APR-01-1996             APR-01-1997
             APR-01-1997
<PERIOD-END>                               SEP-30-1996             DEC-31-1996             MAR-31-1997             JUN-30-1997
             SEP-30-1997
<CASH>                                           4,500                  14,428                  14,747                  14,827
                   9,899
<SECURITIES>                                         0                       0                       0                       0
                       0
<RECEIVABLES>                                   11,116                   9,370                   8,207                  11,755
                  16,582
<ALLOWANCES>                                     2,024                   1,590                   1,589                   1,407
                   1,127
<INVENTORY>                                     10,657                  10,696                  10,800                  12,580
                  14,702
<CURRENT-ASSETS>                                30,572                  37,381                  38,036                  43,327
                  45,427
<PP&E>                                           8,532                  10,073                  11,518                  15,395
                  18,724
<DEPRECIATION>                                   2,532                   3,409                   3,818                   4,680
                   5,947
<TOTAL-ASSETS>                                  36,677                  44,150                  45,875                  54,181
                  58,415
<CURRENT-LIABILITIES>                           26,854                  15,374                  14,314                  18,167
                  19,402
<BONDS>                                              0                       0                       0                       0
                       0
<PREFERRED-MANDATORY>                            7,541                       0                       0                       0
                       0
<PREFERRED>                                          0                       0                       0                       0
                       0
<COMMON>                                            88                     136                     136                     137
                     138
<OTHER-SE>                                    (40,806)                  28,640                  31,425                  34,877
                  38,875
<TOTAL-LIABILITY-AND-EQUITY>                    36,677                  44,150                  45,875                  54,181
                  58,415
<SALES>                                         49,559                  81,702                 106,212                  24,708
                  53,584
<TOTAL-REVENUES>                                49,559                  81,702                 106,212                  24,708
                  53,584
<CGS>                                           31,539                  51,625                  67,115                  18,080
                  35,136
<TOTAL-COSTS>                                   14,785                  18,996                  23,343                   4,272
                   8,805
<OTHER-EXPENSES>                                     0                       0                       0                       0
                       0
<LOSS-PROVISION>                                     0                       0                     175                       0
                       0
<INTEREST-EXPENSE>                               2,670                   2,697                   2,697                       0
                       0
<INCOME-PRETAX>                                    666                   8,672                  13,374                   4,587
                   9,991
<INCOME-TAX>                                       257                   3,337                   5,149                   1,687
                   3,620
<INCOME-CONTINUING>                                409                   5,335                   8,225                   2,900
                   6,371
<DISCONTINUED>                                       0                       0                       0                       0
                       0
<EXTRAORDINARY>                                  1,328                   1,328                   1,328                       0
                       0
<CHANGES>                                            0                       0                       0                       0
                       0
<NET-INCOME>                                     (919)                   4,007                   6,897                   2,900
                   6,371
<EPS-PRIMARY>                                    (.12)                     .36                     .59                     .21
                     .47
<EPS-DILUTED>                                    (.12)                     .35                     .58                     .21
                     .45
        

</TABLE>