<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-START>                             JAN-01-1996             JAN-01-1996             JAN-01-1996             JAN-01-1996
<PERIOD-END>                               MAR-31-1996             JUN-30-1996             SEP-30-1996             DEC-31-1996
<CASH>                                           2,280                  10,497                   7,588                   7,012
<SECURITIES>                                         0                       0                   7,575                   6,027
<RECEIVABLES>                                    2,619                   2,949                   4,159                   5,673
<ALLOWANCES>                                       150                     150                     466                     149
<INVENTORY>                                         92                       0                       0                       0
<CURRENT-ASSETS>                                 5,264                  19,063                  19,334                  19,185
<PP&E>                                           1,708                   2,144                   2,544                   2,875
<DEPRECIATION>                                     768                     877                   1,009                   1,144
<TOTAL-ASSETS>                                   6,522                  20,645                  21,179                  21,719
<CURRENT-LIABILITIES>                            5,122                   5,568                   6,156                   6,604
<BONDS>                                              0                       0                       0                       0
<PREFERRED-MANDATORY>                           12,816                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                            15                      97                      97                     103
<OTHER-SE>                                    (12,012)                  14,430                  14,411                  14,293
<TOTAL-LIABILITY-AND-EQUITY>                     8,522                  20,645                  21,179                  21,719
<SALES>                                          1,942                   4,164                   6,727                   9,711
<TOTAL-REVENUES>                                 2,709                   6,981                   9,853                  14,205
<CGS>                                              145                     441                     751                   1,083
<TOTAL-COSTS>                                      619                   1,471                   2,381                   3,438
<OTHER-EXPENSES>                                 2,676                   5,557                   8,569                  16,547
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                                   7                     142                     355                     540
<INCOME-PRETAX>                                  (579)                   (905)                   (742)                 (5,240)
<INCOME-TAX>                                         0                       0                       0                       0
<INCOME-CONTINUING>                              (579)                   (905)                   (742)                 (5,240)
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                     (579)                   (905)                   (742)                 (5,240)
<EPS-PRIMARY>                                   (0.37)                  (0.16)                  (0.11)                  (0.68)
<EPS-DILUTED>                                   (0.37)                  (0.16)                  (0.11)                  (0.68)
        

</TABLE>