
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS FOR THE SIX MONTHS ENDED JUNE 30, 1996 AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE IN SUCH STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<CASH>                                          29,086
<SECURITIES>                                    48,964
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                79,869
<PP&E>                                           8,478
<DEPRECIATION>                                 (1,307)
<TOTAL-ASSETS>                                  87,689
<CURRENT-LIABILITIES>                           17,532
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             1
<OTHER-SE>                                      68,396
<TOTAL-LIABILITY-AND-EQUITY>                    87,689
<SALES>                                              0
<TOTAL-REVENUES>                                 4,854
<CGS>                                                0
<TOTAL-COSTS>                                    4,887
<OTHER-EXPENSES>                                 6,310
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 114
<INCOME-PRETAX>                                (4,574)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            (4,574)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (4,574)
<EPS-PRIMARY>                                   (0.43)
<EPS-DILUTED>                                        0
        

</TABLE>
