<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 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>                                          20,521
<SECURITIES>                                    33,448
<RECEIVABLES>                                    2,659
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                85,646
<PP&E>                                          25,075
<DEPRECIATION>                                (19,668)
<TOTAL-ASSETS>                                  91,053
<CURRENT-LIABILITIES>                           53,330
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             2
<OTHER-SE>                                      34,439
<TOTAL-LIABILITY-AND-EQUITY>                    91,053
<SALES>                                              0
<TOTAL-REVENUES>                                16,528
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                39,360
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 268
<INCOME-PRETAX>                               (21,504)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (21,504)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (21,504)
<EPS-BASIC>                                      (.88)<F1>
<EPS-DILUTED>                                    (.88)
<FN>
<F1>FOR PURPOSES OF THIS EXHIBIT, PRIMARY MEANS BASIC.
</FN>