<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
QUARTER  ENDED  MARCH 31,  1998 AND IS  QUALIFIED  IN ITS  ENTIRETY  BY
REFERENCE  TO SUCH FORM 10-Q FILED  WITH THE  SECURITIES  AND  EXCHANGE
COMMISSION.  EPS  PRIMARY  REPRESENTS  BASIC  NET LOSS PER  SHARE.  THE
COMPANY  HAS NOT  FILED A  RESTATED  FINANCIAL  DATA  SCHEDULE  FOR THE
PREVIOUSLY   REPORTED   PERIOD  BECAUSE  IT  HAD  NET  LOSSES  FOR  THE
THREE-MONTH  PERIOD  ENDED  MARCH  31,  1997,  AND  AMOUNTS  PREVIOUSLY
REPORTED FOR  EPS-PRIMARY AND EPS- DILUTED DO NOT DIFFER FROM CURRENTLY
REPORTED BASIC AND DILUTED EARNINGS PER SHARE, RESPECTIVELY.
</LEGEND>
<MULTIPLIER>                  1,000
       
                           
<PERIOD-TYPE>                       3-MOS
<FISCAL-YEAR-END>             DEC-31-1998
<PERIOD-START>                JAN-01-1998
<PERIOD-END>                  MAR-31-1998
<CASH>                             25,455
<SECURITIES>                       31,674
<RECEIVABLES>                      11,367
<ALLOWANCES>                         (575)
<INVENTORY>                             0
<CURRENT-ASSETS>                   68,905
<PP&E>                             10,128
<DEPRECIATION>                     (3,015)
<TOTAL-ASSETS>                     76,345
<CURRENT-LIABILITIES>              10,421
<BONDS>                                 0
<PREFERRED-MANDATORY>                   0
<PREFERRED>                             0
<COMMON>                           87,611
<OTHER-SE>                        (25,654)
<TOTAL-LIABILITY-AND-EQUITY>       76,345
<SALES>                             7,279
<TOTAL-REVENUES>                   10,079
<CGS>                                 187
<TOTAL-COSTS>                       1,807
<OTHER-EXPENSES>                    8,718
<LOSS-PROVISION>                        0
<INTEREST-EXPENSE>                   (171)
<INCOME-PRETAX>                      (499)
<INCOME-TAX>                            0
<INCOME-CONTINUING>                  (499)
<DISCONTINUED>                          0
<EXTRAORDINARY>                         0
<CHANGES>                               0
<NET-INCOME>                         (499)
<EPS-PRIMARY>                       (0.02)
<EPS-DILUTED>                       (0.02)