<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
UNAUDITED FINANCIAL STATEMENTS AS OF JUNE 30, 2000 AND FOR THE 3 AND 6 MONTHS
ENDED JUNE 30, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 13,551,065
<SECURITIES> 2,970,186
<RECEIVABLES> 0
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 19,095,742
<PP&E> 8,094,195
<DEPRECIATION> (6,568,440)
<TOTAL-ASSETS> 26,173,546
<CURRENT-LIABILITIES> 3,149,654
<BONDS> 0
0
0
<COMMON> 382,536
<OTHER-SE> 153,096,739
<TOTAL-LIABILITY-AND-EQUITY> 26,173,546
<SALES> 0
<TOTAL-REVENUES> 677,858
<CGS> 0
<TOTAL-COSTS> 9,837,709
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 84,655
<INCOME-PRETAX> (8,355,564)
<INCOME-TAX> 0
<INCOME-CONTINUING> (8,355,564)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (8,355,564)
<EPS-BASIC> (.22)
<EPS-DILUTED> (.22)
</TABLE>