<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE ANNUAL
REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 1997 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH ANNUAL REPORT ON FORM 10-K.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                          12,020
<SECURITIES>                                    26,561
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                40,156
<PP&E>                                           7,303
<DEPRECIATION>                                 (6,568)
<TOTAL-ASSETS>                                  40,891
<CURRENT-LIABILITIES>                            6,568
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            18
<OTHER-SE>                                      34,305
<TOTAL-LIABILITY-AND-EQUITY>                    40,891
<SALES>                                              0
<TOTAL-REVENUES>                                 4,035
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                20,266
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                               (13,838)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (13,838)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (13,838)
<EPS-PRIMARY>                                   (0.79)
<EPS-DILUTED>                                   (0.79)