<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997
<CASH>                                             998                   1,304                     861
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                    6,491                   7,945                   7,583
<ALLOWANCES>                                       236                     224                     228
<INVENTORY>                                      8,836                   8,011                   7,844
<CURRENT-ASSETS>                                17,583                  18,067                  17,382
<PP&E>                                           8,827                  10,813                  11,075
<DEPRECIATION>                                   3,535                   5,679                   6,079
<TOTAL-ASSETS>                                  31,968                  32,908                  25,460
<CURRENT-LIABILITIES>                           17,172                  14,776                  15,101
<BONDS>                                          3,335                   3,213                   3,013
<PREFERRED-MANDATORY>                              811                     686                     701
<PREFERRED>                                          0                       0                       0
<COMMON>                                            31                      38                      38
<OTHER-SE>                                       9,882                  12,704                   5,890
<TOTAL-LIABILITY-AND-EQUITY>                    31,968                  32,908                  25,460
<SALES>                                          7,707                  19,736                  31,272
<TOTAL-REVENUES>                                 7,707                  19,736                  31,272
<CGS>                                            6,234                  14,972                  23,542
<TOTAL-COSTS>                                    6,234                  14,972                  23,542
<OTHER-EXPENSES>                                     0                       0                       0
<LOSS-PROVISION>                                   (6)                      16                       4
<INTEREST-EXPENSE>                                 198                     460                     659
<INCOME-PRETAX>                                  (599)                 (2,036)                 (8,805)
<INCOME-TAX>                                         4                       2                       6
<INCOME-CONTINUING>                              (603)                 (2,038)                 (8,811)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     (603)                 (2,038)                 (8,811)
<EPS-PRIMARY>                                   (0.10)                  (0.24)                  (0.92)
<EPS-DILUTED>                                   (0.10)                  (0.24)                  (0.92)
        

</TABLE>