<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEETS AND CONDENSED CONSOLIDATED STATEMENTS OF
OPERATIONS CONTAINED IN THE COMPANY'S QUARTERLY REPORT ON FORM 10-Q FOR THE
QUARTER ENDED SEPTEMBER 30, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS AND THE NOTES THERETO.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                          19,047
<SECURITIES>                                    46,194
<RECEIVABLES>                                    4,564
<ALLOWANCES>                                         0
<INVENTORY>                                      8,824
<CURRENT-ASSETS>                                91,136
<PP&E>                                          36,968
<DEPRECIATION>                                  15,486
<TOTAL-ASSETS>                                 115,992
<CURRENT-LIABILITIES>                           12,288
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            20
<OTHER-SE>                                      98,918
<TOTAL-LIABILITY-AND-EQUITY>                    98,938
<SALES>                                              0
<TOTAL-REVENUES>                                59,206
<CGS>                                                0
<TOTAL-COSTS>                                   33,172
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 523
<INCOME-PRETAX>                                      0
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<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    15,765
<EPS-PRIMARY>                                     0.80
<EPS-DILUTED>                                     0.67