<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS INCLUDED IN THIS 10-Q AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH CONSOLIDATED FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 6-MOS 6-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-1999
<PERIOD-START> JAN-01-2000 JAN-01-1999
<PERIOD-END> JUN-30-2000 JUN-30-1999
<CASH> 1,192 2,575
<SECURITIES> 16,669 18,305
<RECEIVABLES> 2,413 5,968
<ALLOWANCES> 1,121 1,694
<INVENTORY> 813 720
<CURRENT-ASSETS> 21,413 28,131
<PP&E> 4,582 4,202
<DEPRECIATION> 3,069 2,387
<TOTAL-ASSETS> 23,566 35,077
<CURRENT-LIABILITIES> 5,761 6,793
<BONDS> 0 0
0 0
0 0
<COMMON> 130 130
<OTHER-SE> 17,675 27,726
<TOTAL-LIABILITY-AND-EQUITY> 23,566 35,077
<SALES> 5,108 10,402
<TOTAL-REVENUES> 8,548 14,018
<CGS> 1,455 2,602
<TOTAL-COSTS> 3,597 4,380
<OTHER-EXPENSES> 8,091 12,550
<LOSS-PROVISION> 0 2
<INTEREST-EXPENSE> 0 0
<INCOME-PRETAX> (2,615) (2,576)
<INCOME-TAX> 0 (601)
<INCOME-CONTINUING> (2,615) (1,975)
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> (2,615) (1,975)
<EPS-BASIC> (0.21) (0.16)
<EPS-DILUTED> (0.21) (0.16)
</TABLE>