<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM 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>                             APR-01-1996             APR-01-1997
<PERIOD-END>                               JUN-30-1996             JUN-30-1997
<CASH>                                             329                   4,957
<SECURITIES>                                         0                       0
<RECEIVABLES>                                    7,845                   6,905
<ALLOWANCES>                                       640                     668
<INVENTORY>                                      4,835                   6,811
<CURRENT-ASSETS>                                12,964                  18,272
<PP&E>                                           9,159                   8,793
<DEPRECIATION>                                   6,102                   6,341
<TOTAL-ASSETS>                                  17,897                  22,639
<CURRENT-LIABILITIES>                           11,342                  11,089
<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                  22,639
<SALES>                                          5,049                   6,076
<TOTAL-REVENUES>                                 5,556                   6,799
<CGS>                                            3,022                   3,507
<TOTAL-COSTS>                                    3,342                   4,051
<OTHER-EXPENSES>                                 3,219                   7,253
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                 253                     113
<INCOME-PRETAX>                                 (1,253)                 (4,566)
<INCOME-TAX>                                      (354)                   (310)
<INCOME-CONTINUING>                               (899)                 (4,256)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                      (899)                 (4,256)
<EPS-PRIMARY>                                        0                   (.81)
<EPS-DILUTED>                                        0                   (.57)
        

</TABLE>