<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEET AND THE CONDENSED CONSOLIDATED STATEMENT OF
INCOME OF THIS FORM 10-Q AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1997
<PERIOD-START>                             JUL-01-1996             JUL-01-1997
<PERIOD-END>                               SEP-30-1996             SEP-30-1997
<CASH>                                             329                   2,006
<SECURITIES>                                         0                       0
<RECEIVABLES>                                    7,845                   4,122
<ALLOWANCES>                                       640                     728
<INVENTORY>                                      4,835                   7,900
<CURRENT-ASSETS>                                12,964                  13,587
<PP&E>                                           9,159                   9,323
<DEPRECIATION>                                   6,102                   6,754
<TOTAL-ASSETS>                                  17,897                  18,162
<CURRENT-LIABILITIES>                           11,342                   8,872
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                             1                       1
<OTHER-SE>                                      28,019                  50,225
<TOTAL-LIABILITY-AND-EQUITY>                    17,897                  18,162
<SALES>                                          3,040                   2,214
<TOTAL-REVENUES>                                 3,776                   2,852
<CGS>                                            1,757                   1,139
<TOTAL-COSTS>                                    2,185                   1,714
<OTHER-EXPENSES>                                 3,724                   3,469
<LOSS-PROVISION>                                     0                      40
<INTEREST-EXPENSE>                                 262                      17
<INCOME-PRETAX>                                 (2,390)                 (2,292)
<INCOME-TAX>                                      (781)                     29
<INCOME-CONTINUING>                             (1,609)                 (2,321)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    (1,609)                 (2,321)
<EPS-PRIMARY>                                        0                    (.37)
<EPS-DILUTED>                                        0                    (.36)
        

</TABLE>