<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THE CONSOLIDATED BALANCE SHEET AS OF DECEMBER 31, 1999 AND THE CONSOLIDATED
STATEMENT OF OPERATIONS FOR THE YEAR ENDED DECEMBER 31, 1999.
</LEGEND>
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-START> JAN-01-1999
<PERIOD-END> DEC-31-1999
<CASH> 5,674,386
<SECURITIES> 18,205,630
<RECEIVABLES> 0
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 24,996,158
<PP&E> 16,550,053
<DEPRECIATION> 11,514,370
<TOTAL-ASSETS> 30,847,891
<CURRENT-LIABILITIES> 7,290,831
<BONDS> 2,653,111
0
6,227,960
<COMMON> 173,391,407
<OTHER-SE> (158,715,418)
<TOTAL-LIABILITY-AND-EQUITY> 30,847,891
<SALES> 0
<TOTAL-REVENUES> 0
<CGS> 0
<TOTAL-COSTS> 37,470,466
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 501,596
<INCOME-PRETAX> (41,480,663)
<INCOME-TAX> 0
<INCOME-CONTINUING> (41,480,663)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (41,480,663)
<EPS-BASIC> (2.67)
<EPS-DILUTED> (2.67)
</TABLE>