<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
UNAUDITED FINANCIALS IN THE COMPANY'S 9/30/96 10-Q AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED> 
<MULTIPLIER>     1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996
<PERIOD-START>                             JUL-01-1996             JAN-01-1996
<PERIOD-END>                               SEP-30-1996             SEP-30-1996
<CASH>                                           9,768                   9,768
<SECURITIES>                                    30,896                  30,896
<RECEIVABLES>                                    5,411                   5,411
<ALLOWANCES>                                       175                     175
<INVENTORY>                                        296                     296
<CURRENT-ASSETS>                                46,743                  46,743
<PP&E>                                           3,137                   3,137
<DEPRECIATION>                                     456                     456
<TOTAL-ASSETS>                                  49,689                  49,689
<CURRENT-LIABILITIES>                            7,673                   7,673
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            15                      15
<OTHER-SE>                                      42,001                  42,001
<TOTAL-LIABILITY-AND-EQUITY>                    49,689                  49,689
<SALES>                                          5,434                  10,967
<TOTAL-REVENUES>                                 5,334                  10,867
<CGS>                                            1,845                   4,273
<TOTAL-COSTS>                                    1,845                   4,273
<OTHER-EXPENSES>                                 4,335                  16,712
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               (467)                   (431)
<INCOME-PRETAX>                                  (379)                 (9,687)
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                              (379)                 (9,687)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     (379)                 (9,687)
<EPS-PRIMARY>                                    (.03)<F1>             (.87)<F1>
<EPS-DILUTED>                                    (.03)<F1>             (.87)<F1>
<FN>
<F1>RESTATED TO CONFORM TO STATEMENT OF FINANCIAL ACCOUNTING STANDARDS NO. 128.
</FN>
        

</TABLE>