<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                          20,669
<SECURITIES>                                    14,163<F1>
<RECEIVABLES>                                    3,171
<ALLOWANCES>                                       123
<INVENTORY>                                        924
<CURRENT-ASSETS>                                39,784
<PP&E>                                          15,741
<DEPRECIATION>                                  11,145
<TOTAL-ASSETS>                                  49,277
<CURRENT-LIABILITIES>                           29,843
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       122,728
<OTHER-SE>                                   (136,528)
<TOTAL-LIABILITY-AND-EQUITY>                    49,277
<SALES>                                          4,212
<TOTAL-REVENUES>                                29,502
<CGS>                                            3,054
<TOTAL-COSTS>                                   10,413
<OTHER-EXPENSES>                                70,689
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               1,631
<INCOME-PRETAX>                               (50,322)
<INCOME-TAX>                                       138
<INCOME-CONTINUING>                           (50,460)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (50,460)
<EPS-PRIMARY>                                   (2.67)
<EPS-DILUTED>                                   (2.67)
<FN>
<F1>This amount represents short-term investments held by the company at 12/31/97
</FN>