<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM QUARTERLY
REPORT PURSUANT TO SECTION 13 OR 15(d) THE SECURITIES EXCHANGE ACT OF 1934 FOR
QUARTERLY PERIOD ENDED JUNE 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-START>                             MAR-31-1997             JAN-01-1997
<PERIOD-END>                               JUN-30-1997             JUN-30-1997
<CASH>                                           6,165                   6,165
<SECURITIES>                                         0                       0
<RECEIVABLES>                                    2,693                   2,693
<ALLOWANCES>                                       194                     194
<INVENTORY>                                        422                     422
<CURRENT-ASSETS>                                11,913                  11,913
<PP&E>                                          30,606                  30,606
<DEPRECIATION>                                   8,152                   8,152
<TOTAL-ASSETS>                                  36,387                  36,387
<CURRENT-LIABILITIES>                           23,630                  23,630
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            98                      98
<OTHER-SE>                                      55,276                  55,276
<TOTAL-LIABILITY-AND-EQUITY>                    36,387                  36,387
<SALES>                                              0                       0
<TOTAL-REVENUES>                                18,846                  34,564
<CGS>                                                0                       0
<TOTAL-COSTS>                                    9,991                  18,861
<OTHER-EXPENSES>                                16,296                  47,477
<LOSS-PROVISION>                                   837                   1,974
<INTEREST-EXPENSE>                                 444                     951
<INCOME-PRETAX>                                (7,750)                (16,129)
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                            (7,441)                (15,478)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                   (7,750)                (16,129)
<EPS-PRIMARY>                                   (0.80)                  (1.71)
<EPS-DILUTED>                                   (0.80)                  (1.71)
        

</TABLE>