<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                          18,708
<SECURITIES>                                    36,539<F1>
<RECEIVABLES>                                    1,515
<ALLOWANCES>                                       400
<INVENTORY>                                        770
<CURRENT-ASSETS>                                58,379
<PP&E>                                          18,766
<DEPRECIATION>                                  12,618
<TOTAL-ASSETS>                                  71,967
<CURRENT-LIABILITIES>                           14,662
<BONDS>                                         76,117
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       136,921
<OTHER-SE>                                   (161,301)
<TOTAL-LIABILITY-AND-EQUITY>                    71,967
<SALES>                                            587
<TOTAL-REVENUES>                                 9,123
<CGS>                                              424
<TOTAL-COSTS>                                    2,701
<OTHER-EXPENSES>                                31,015
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               1,989
<INCOME-PRETAX>                               (24,810)
<INCOME-TAX>                                        10
<INCOME-CONTINUING>                           (24,830)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (24,820)
<EPS-PRIMARY>                                   (1.23)
<EPS-DILUTED>                                   (1.23)
<FN>
<F1>THIS AMOUNT REPRESENTS SHORT-TERM INVESTMENTS HELD BY THE COMPANY 9/30/98.
</FN>