<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED BALANCE SHEETS, STATEMENTS OF OPERATIONS, AND STATEMENTS OF CASH FLOWS
INCLUDED IN THE COMPANY'S FORM 10-Q FOR THE PERIOD 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>                                          15,671
<SECURITIES>                                    65,200
<RECEIVABLES>                                    1,952
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                98,937
<PP&E>                                          25,325
<DEPRECIATION>                                (19,830)
<TOTAL-ASSETS>                                 104,432
<CURRENT-LIABILITIES>                           32,262
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             2
<OTHER-SE>                                      69,141
<TOTAL-LIABILITY-AND-EQUITY>                   104,432
<SALES>                                              0
<TOTAL-REVENUES>                                35,775
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                50,866
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 578
<INCOME-PRETAX>                               (12,322)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (12,322)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (12,322)
<EPS-PRIMARY>                                    (.51)<F1>
<EPS-DILUTED>                                    (.51)
<FN>
<F1>For the Purpose of this Exhibit, Primary means Basic.
</FN>