<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 JUNE 30, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIALS STATEMENTS AND THE NOTES THERETO.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          31,817
<SECURITIES>                                    38,657
<RECEIVABLES>                                    2,698
<ALLOWANCES>                                         0
<INVENTORY>                                      8,324
<CURRENT-ASSETS>                                89,584
<PP&E>                                          36,354
<DEPRECIATION>                                  14,433
<TOTAL-ASSETS>                                 114,848
<CURRENT-LIABILITIES>                           13,149
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            20
<OTHER-SE>                                      96,630
<TOTAL-LIABILITY-AND-EQUITY>                    96,650
<SALES>                                              0
<TOTAL-REVENUES>                                42,197
<CGS>                                                0
<TOTAL-COSTS>                                   21,108
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 364
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                       130
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    14,000
<EPS-PRIMARY>                                     0.71
<EPS-DILUTED>                                     0.60