<ARTICLE> 5
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   12-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1997
<PERIOD-START>                             JAN-01-1996             JAN-01-1997
<PERIOD-END>                               DEC-31-1996             DEC-31-1997
<CASH>                                           9,818                   9,477
<SECURITIES>                                    26,922                  25,274
<RECEIVABLES>                                   19,916                  22,517
<ALLOWANCES>                                     3,940                   5,169
<INVENTORY>                                     15,077                  19,075
<CURRENT-ASSETS>                                74,250                  79,154
<PP&E>                                          11,962                  20,513
<DEPRECIATION>                                   4,765                   7,205
<TOTAL-ASSETS>                                  85,048                  94,837
<CURRENT-LIABILITIES>                           15,878                  15,889
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            82                      82
<OTHER-SE>                                      69,088                  78,866
<TOTAL-LIABILITY-AND-EQUITY>                    85,048                  94,837
<SALES>                                         95,045                 128,481
<TOTAL-REVENUES>                                95,045                 128,481
<CGS>                                           58,995                  83,553
<TOTAL-COSTS>                                   58,995                  83,553
<OTHER-EXPENSES>                                26,675                  35,029
<LOSS-PROVISION>                                   255                     155
<INTEREST-EXPENSE>                                 173                      30
<INCOME-PRETAX>                                  8,947                   9,741
<INCOME-TAX>                                     3,250                   3,330
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     5,697                   6,411
<EPS-PRIMARY>                                     0.74                    0.81
<EPS-DILUTED>                                     0.71                    0.77