<ARTICLE> 5
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   12-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1998
<PERIOD-START>                             JAN-01-1997             JAN-01-1998
<PERIOD-END>                               DEC-31-1997             DEC-31-1998
<CASH>                                           9,477                   5,471
<SECURITIES>                                    25,274                  32,191
<RECEIVABLES>                                   22,517                  28,220
<ALLOWANCES>                                     5,169                   4,955
<INVENTORY>                                     19,075                  15,954
<CURRENT-ASSETS>                                79,154                  84,935
<PP&E>                                          20,513                  28,339
<DEPRECIATION>                                   7,205                  10,887
<TOTAL-ASSETS>                                  94,837                 104,345
<CURRENT-LIABILITIES>                           15,889                  25,875
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            82                      82 
<OTHER-SE>                                      78,866                  78,369
<TOTAL-LIABILITY-AND-EQUITY>                    94,837                 104,345
<SALES>                                        128,481                 144,370
<TOTAL-REVENUES>                               128,481                 144,370
<CGS>                                           83,553                  88,950
<TOTAL-COSTS>                                   83,553                  88,950
<OTHER-EXPENSES>                                35,029                  40,980
<LOSS-PROVISION>                                   155                     529
<INTEREST-EXPENSE>                                  30                     135
<INCOME-PRETAX>                                  9,741                  13,776
<INCOME-TAX>                                     3,330                   4,408
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     6,411                   9,368
<EPS-PRIMARY>                                     0.81                    1.22
<EPS-DILUTED>                                     0.77                    1.20