
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS AS FILED ON FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 30,
1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                          18,312
<SECURITIES>                                    44,552
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                64,537
<PP&E>                                          45,421
<DEPRECIATION>                                 (7,503)
<TOTAL-ASSETS>                                 102,599
<CURRENT-LIABILITIES>                           10,368
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         1,569
<OTHER-SE>                                     135,452
<TOTAL-LIABILITY-AND-EQUITY>                   102,599
<SALES>                                              0
<TOTAL-REVENUES>                                15,427
<CGS>                                                0
<TOTAL-COSTS>                                   30,572
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               3,104
<INCOME-PRETAX>                               (12,041)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (12,041)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (12,041)
<EPS-PRIMARY>                                   (0.77)
<EPS-DILUTED>                                        0
        

</TABLE>
