<TABLE> <S> <C>

<PAGE>

<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
Consolidated Balance Sheets as of June 30, 2000 (Unaudited) and the Consolidated
Statements of Income for the Six Months Ended June 30, 2000 and is qualified in
its entirety by reference to such financial statements.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                          29,044
<SECURITIES>                                    56,345
<RECEIVABLES>                                   14,056
<ALLOWANCES>                                         0
<INVENTORY>                                      5,419
<CURRENT-ASSETS>                               111,565
<PP&E>                                           6,390
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                 126,681
<CURRENT-LIABILITIES>                           18,839
<BONDS>                                              0
                                0
                                          0
<COMMON>                                        56,267
<OTHER-SE>                                      51,575
<TOTAL-LIABILITY-AND-EQUITY>                   126,681
<SALES>                                         50,115
<TOTAL-REVENUES>                                50,115
<CGS>                                           17,142
<TOTAL-COSTS>                                   17,142
<OTHER-EXPENSES>                                27,508
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                  8,951
<INCOME-TAX>                                     3,188
<INCOME-CONTINUING>                              5,763
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     5,763
<EPS-BASIC>                                       0.19
<EPS-DILUTED>                                     0.17


</TABLE>



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