<ARTICLE> 5
<MULTIPLIER> 1,000

                                                                       
<PERIOD-TYPE>                   12-MOS                   12-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1998             DEC-31-1997
<PERIOD-START>                             JAN-01-1999             JAN-01-1998             JAN-01-1997
<PERIOD-END>                               DEC-31-1999             DEC-31-1998             DEC-31-1997
<CASH>                                           1,950                   2,196                     805
<SECURITIES>                                     5,606                  12,206                   9,887
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<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                                 7,893                  14,899                  10,917
<PP&E>                                           5,636                   5,396                   5,096
<DEPRECIATION>                                   4,439                   3,830                   3,232
<TOTAL-ASSETS>                                   9,170                  16,586                  12,902
<CURRENT-LIABILITIES>                            3,957                   3,984                   3,667
<BONDS>                                              0                       0                       0
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<PREFERRED>                                         10                      10                       8
<COMMON>                                            22                      22                      22
<OTHER-SE>                                      56,742                  56,465                  46,149
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<SALES>                                              0                       0                       0
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<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                   11,699                  10,101                  10,560
<OTHER-EXPENSES>                                     0                       0                       0
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<INCOME-PRETAX>                                 (7,064)                 (6,579)                 (8,618)
<INCOME-TAX>                                         0                       0                       0
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<NET-INCOME>                                    (7,064)                 (6,579)                 (8,618)
<EPS-BASIC>                                     $(3.21)                 $(3.00)                 $(3.95)
<EPS-DILUTED>                                   $(3.21)                 $(3.00)                 $(3.95)