<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE INCOME
STATEMENT FOR THE NINE-MONTH PERIOD ENDED SEPTEMBER 30, 1999, AND THE BALANCE
SHEET AS OF SEPTEMBER 30, 1999, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                           3,489
<SECURITIES>                                    13,516
<RECEIVABLES>                                   14,681
<ALLOWANCES>                                       265
<INVENTORY>                                     14,320
<CURRENT-ASSETS>                                48,950
<PP&E>                                          25,252
<DEPRECIATION>                                  14,318
<TOTAL-ASSETS>                                  67,919
<CURRENT-LIABILITIES>                            8,939
<BONDS>                                            251
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            75
<OTHER-SE>                                      57,237
<TOTAL-LIABILITY-AND-EQUITY>                    67,919
<SALES>                                         32,504
<TOTAL-REVENUES>                                39,279
<CGS>                                           11,666
<TOTAL-COSTS>                                   14,999
<OTHER-EXPENSES>                                20,218
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  36
<INCOME-PRETAX>                                  4,516
<INCOME-TAX>                                     1,445
<INCOME-CONTINUING>                              3,071
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     3,071
<EPS-BASIC>                                        .41
<EPS-DILUTED>                                      .39