<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS INCLUDED IN THE ANNUAL REPORT ON FORM 10-K FOR THE YEAR
ENDED 12-31-94 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1994
<PERIOD-START>                             JAN-01-1994
<PERIOD-END>                               DEC-31-1994
<CASH>                                          29,674
<SECURITIES>                                    74,765
<RECEIVABLES>                                    3,599
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                56,861
<PP&E>                                          61,650
<DEPRECIATION>                                  26,532
<TOTAL-ASSETS>                                 146,096
<CURRENT-LIABILITIES>                           17,919
<BONDS>                                          1,739
<COMMON>                                            35
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                     126,403
<TOTAL-LIABILITY-AND-EQUITY>                   146,096
<SALES>                                         42,792
<TOTAL-REVENUES>                                53,667
<CGS>                                           26,541
<TOTAL-COSTS>                                   31,714
<OTHER-EXPENSES>                                53,672
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                               (27,961)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (27,961)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (27,961)
<EPS-PRIMARY>                                   (0.79)
<EPS-DILUTED>                                   (0.79)