<ARTICLE> 5
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                           2,660
<SECURITIES>                                    10,813
<RECEIVABLES>                                      130
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                13,913
<PP&E>                                           9,781
<DEPRECIATION>                                   7,933
<TOTAL-ASSETS>                                  19,986
<CURRENT-LIABILITIES>                            6,665
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                      9,682
<COMMON>                                       138,579
<OTHER-SE>                                   (135,563)<F1>
<TOTAL-LIABILITY-AND-EQUITY>                    19,986
<SALES>                                              0
<TOTAL-REVENUES>                                 4,139
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                 9,348<F2>
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               (293)
<INCOME-PRETAX>                                (4,916)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            (4,916)
<DISCONTINUED>                                   (348)
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (5,264)
<EPS-BASIC>                                     (0.13)
<EPS-DILUTED>                                   (0.13)
<FN>
<F1>CONSISTS OF ACCUMULATED DEFICIT AND ACCUMULATED OTHER COMPREHENSIVE INCOME.
<F2>CONSISTS OF RESEARCH AND DEVELOPMENT, AND GENERAL AND ADMINISTRATIVE
EXPENSES.
</FN>