<ARTICLE> 5
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                           8,785
<SECURITIES>                                    31,607
<RECEIVABLES>                                    4,579
<ALLOWANCES>                                       147
<INVENTORY>                                      3,527
<CURRENT-ASSETS>                                48,131
<PP&E>                                          36,630
<DEPRECIATION>                                  20,559
<TOTAL-ASSETS>                                  68,760
<CURRENT-LIABILITIES>                           21,515
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            32
<OTHER-SE>                                      41,464
<TOTAL-LIABILITY-AND-EQUITY>                    68,760
<SALES>                                         41,164
<TOTAL-REVENUES>                                43,188
<CGS>                                           12,369
<TOTAL-COSTS>                                   25,392
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 19,790
<INCOME-TAX>                                       989
<INCOME-CONTINUING>                             18,801
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    18,801
<EPS-BASIC>                                       0.59<F1>
<EPS-DILUTED>                                     0.58
<FN>
<F1>For Purposes of this Exhibit, Primary Means Basic.
</FN>