<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 12-MOS 12-MOS
<FISCAL-YEAR-END> DEC-31-1998 DEC-31-1997
<PERIOD-START> JAN-01-1998 JAN-01-1997
<PERIOD-END> DEC-31-1998 DEC-31-1997
<CASH> 2,196 805
<SECURITIES> 12,206 9,887
<RECEIVABLES> 0 0
<ALLOWANCES> 0 0
<INVENTORY> 0 0
<CURRENT-ASSETS> 14,899 10,917
<PP&E> 5,396 5,096
<DEPRECIATION> 3,830 3,232
<TOTAL-ASSETS> 16,586 12,902
<CURRENT-LIABILITIES> 3,984 3,667
<BONDS> 0 0
0 0
10 8
<COMMON> 22 22
<OTHER-SE> 56,465 46,149
<TOTAL-LIABILITY-AND-EQUITY> 12,177 12,902
<SALES> 0 0
<TOTAL-REVENUES> 3,194 1,652
<CGS> 0 0
<TOTAL-COSTS> 10,101 10,560
<OTHER-EXPENSES> 0 0
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> (328) (290)
<INCOME-PRETAX> (6,579) (8,618)
<INCOME-TAX> 0 0
<INCOME-CONTINUING> 0 0
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> (6,579) (8,618)
<EPS-BASIC> $(3.00) $(3.95)
<EPS-DILUTED> $(3.00) $(3.95)
</TABLE>