<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          MAR-31-1998
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                           3,408
<SECURITIES>                                    23,070
<RECEIVABLES>                                    1,383
<ALLOWANCES>                                        43
<INVENTORY>                                      1,588
<CURRENT-ASSETS>                                30,468
<PP&E>                                           7,303
<DEPRECIATION>                                 (4,638)
<TOTAL-ASSETS>                                  33,544
<CURRENT-LIABILITIES>                            8,306
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          1
<COMMON>                                            15
<OTHER-SE>                                      25,222
<TOTAL-LIABILITY-AND-EQUITY>                    33,544
<SALES>                                          4,121
<TOTAL-REVENUES>                                12,201
<CGS>                                            1,408
<TOTAL-COSTS>                                   18,891
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   1<F1>  
<INCOME-PRETAX>                                (6,691)
<INCOME-TAX>                                       200
<INCOME-CONTINUING>                            (6,891)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (6,891)
<EPS-PRIMARY>                                   (0.46)
<EPS-DILUTED>                                   (0.46)
<FN> 
<F1>net of interest income
</FN>