
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   12-MOS                   3-MOS
<FISCAL-YEAR-END>                          SEP-30-1998             SEP-30-1998
<PERIOD-START>                             OCT-01-1997             OCT-01-1998
<PERIOD-END>                               SEP-30-1998             DEC-31-1998
<CASH>                                           6,206                   4,458
<SECURITIES>                                         0                       0
<RECEIVABLES>                                    2,414                   3,260
<ALLOWANCES>                                       382                     354
<INVENTORY>                                         99                     380
<CURRENT-ASSETS>                                 8,587                   7,976
<PP&E>                                             992                   1,323
<DEPRECIATION>                                     310                     403
<TOTAL-ASSETS>                                   9,432                   9,037
<CURRENT-LIABILITIES>                            1,824                   3,107
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                     11,885                  11,885
<COMMON>                                         2,875                   4,355
<OTHER-SE>                                     (7,152)                (10,310)
<TOTAL-LIABILITY-AND-EQUITY>                     9,432                   9,037
<SALES>                                          4,889                   2,695
<TOTAL-REVENUES>                                 4,889                   2,695
<CGS>                                            1,405                     820
<TOTAL-COSTS>                                    7,152                   4,129
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                  42                       1
<INCOME-PRETAX>                                (3,672)                 (2,196)
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                            (3,672)                 (2,196)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                   (3,672)                 (2,196)
<EPS-PRIMARY>                                   (0.60)                  (0.36)
<EPS-DILUTED>                                   (0.60)                  (0.36)
        

</TABLE>
