<TABLE> <S> <C>

<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS INCLUDED IN THE FORM 10-K FOR THE YEAR ENDED DECEMBER 31,
1996 AND THE RESPECTIVE FORM 10Q FOR THE QUARTERS ENDED SEPTEMBER 30, 1996, JUNE
30, 1996 AND MARCH 31, 1996 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<CURRENCY> U.S. DOLLARS

<S>                                               <C>              <C>                <C>               <C>              <C>
<PERIOD-TYPE>                                     12-MOS           12-MOS             9-MOS             6-MOS            3-MOS
<FISCAL-YEAR-END>                            DEC-31-1996      DEC-31-1995       DEC-31-1996       DEC-31-1996      DEC-31-1996
<PERIOD-START>                               JAN-01-1996      JAN-01-1995       JUL-01-1996       APR-01-1996      JAN-01-1996
<PERIOD-END>                                 DEC-31-1996      DEC-31-1995       SEP-30-1996       JUN-30-1996      MAR-31-1996
<EXCHANGE-RATE>                                        1                1                 1                 1                1
<CASH>                                            10,952            2,465            17,413             3,253            3,381
<SECURITIES>                                      11,087            1,488             4,491             3,455            4,949
<RECEIVABLES>                                     11,694            8,655             9,468             7,797            9,212
<ALLOWANCES>                                         823              592               592               420              637
<INVENTORY>                                            0                0                 0                 0                0
<CURRENT-ASSETS>                                  34,333           12,462            32,211            15,541           17,337
<PP&E>                                             9,441            7,945             8,848             8,727            8,097
<DEPRECIATION>                                     6,223            4,375             5,777             5,424            4,780
<TOTAL-ASSETS>                                    38,461           17,154            37,312            20,241           21,805
<CURRENT-LIABILITIES>                             10,108           13,452            10,131            11,670           13,063
<BONDS>                                              120              476                61               223              344
<PREFERRED-MANDATORY>                                  0           35,982                 0            41,898           41,232
<PREFERRED>                                            0                0                 0                 0                0
<COMMON>                                              27                2                26                 5                2
<OTHER-SE>                                        28,206         (32,759)            27,094          (33,555)         (32,837)
<TOTAL-LIABILITY-AND-EQUITY>                      28,233           17,154            37,312            20,241           21,805
<SALES>                                           25,640           18,700            17,961            11,329            5,612
<TOTAL-REVENUES>                                  38,339           32,706            27,719            18,194            8,996
<CGS>                                              1,597            1,088             1,264               784              499
<TOTAL-COSTS>                                      8,746            8,920             6,585             4,390            2,407
<OTHER-EXPENSES>                                  28,353           34,192            20,384            13,373            6,398
<LOSS-PROVISION>                                       0              572                 0                 0               96
<INTEREST-EXPENSE>                                     0              136                 0                 0               39
<INCOME-PRETAX>                                    1,760         (10,284)               962               452              169
<INCOME-TAX>                                          67                2                24                24               24
<INCOME-CONTINUING>                                1,693                0               938               428                0
<DISCONTINUED>                                         0                0                 0                 0                0
<EXTRAORDINARY>                                        0                0                 0                 0                0
<CHANGES>                                              0                0                 0                 0                0
<NET-INCOME>                                       1,693         (10,282)               938               428              145
<EPS-PRIMARY>                                       0.03           (4.59)             (0.03)            (0.19)           (0.08)
<EPS-DILUTED>                                       0.02           (4.59)             (0.03)            (0.19)           (0.08)


</TABLE>