<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, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS AND THE NOTES THERETO.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                          68,505
<SECURITIES>                                   144,684
<RECEIVABLES>                                    1,266
<ALLOWANCES>                                       114
<INVENTORY>                                      9,487
<CURRENT-ASSETS>                               247,976
<PP&E>                                          38,949
<DEPRECIATION>                                  18,675
<TOTAL-ASSETS>                                 275,605
<CURRENT-LIABILITIES>                           15,759
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            20
<OTHER-SE>                                     136,631
<TOTAL-LIABILITY-AND-EQUITY>                   136,651
<SALES>                                              0
<TOTAL-REVENUES>                                55,805
<CGS>                                                0
<TOTAL-COSTS>                                   22,240
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               2,629
<INCOME-PRETAX>                                 25,951
<INCOME-TAX>                                     1,234
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    24,717
<EPS-BASIC>                                       1.21
<EPS-DILUTED>                                     1.01