<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C> <C> <C> <C>
<PERIOD-TYPE> 3-MOS 12-MOS 12-MOS 12-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-1999 DEC-31-1998 DEC-31-1997
<PERIOD-START> JAN-01-2000 JAN-01-1999 JAN-01-1998 JAN-01-1997
<PERIOD-END> MAR-31-2000 DEC-31-1999 DEC-31-1998 DEC-31-1997
<CASH> 8,648 10,568 22,975 13,179
<SECURITIES> 4,827 6,835 10,980 2,946
<RECEIVABLES> 340 444 19 0
<ALLOWANCES> (50) (30) 0 0
<INVENTORY> 1,299 1,381 68 0
<CURRENT-ASSETS> 15,576 19,446 35,236 16,240
<PP&E> 4,435 4,108 3,048 1,354
<DEPRECIATION> (2,240) (2,015) (1,077) (500)
<TOTAL-ASSETS> 18,062 21,714 37,391 17,256
<CURRENT-LIABILITIES> 2,915 2,365 1,207 270
<BONDS> 0 0 0 0
0 0 0 0
49,611 49,611 49,611 21,128
<COMMON> 11 11 11 10
<OTHER-SE> (34,655) (30,273) (13,438) (4,182)
<TOTAL-LIABILITY-AND-EQUITY> 18,062 21,714 37,391 17,256
<SALES> 742 648 180 0
<TOTAL-REVENUES> 742 648 180 0
<CGS> (1,487) (2,420) (196) 0
<TOTAL-COSTS> (10,320) (31,298) (34,643) (3,213)
<OTHER-EXPENSES> 0 0 0 0
<LOSS-PROVISION> 0 0 0 0
<INTEREST-EXPENSE> 0 0 0 0
<INCOME-PRETAX> (11,065) (31,702) (33,657) (2,771)
<INCOME-TAX> 0 0 0 0
<INCOME-CONTINUING> 0 0 0 0
<DISCONTINUED> 0 0 0 0
<EXTRAORDINARY> 0 0 0 0
<CHANGES> 0 0 0 0
<NET-INCOME> (11,065) (31,702) (33,657) (2,771)
<EPS-BASIC> (0.98) (2.98) (3.32) (0.28)
<EPS-DILUTED> (0.98) (2.98) (3.32) (0.28)
</TABLE>