<ARTICLE> 5
<MULTIPLIER> 1,000

                                                  
<PERIOD-TYPE>                   YEAR                    YEAR
<FISCAL-YEAR-END>                          MAR-31-1999             MAR-31-1998
<PERIOD-START>                             APR-01-1998             APR-01-1997
<PERIOD-END>                               MAR-31-1999             MAR-31-1998
<CASH>                                          24,969                   1,842
<SECURITIES>                                     6,602                   6,167
<RECEIVABLES>                                    4,099                   2,992
<ALLOWANCES>                                         0                       0
<INVENTORY>                                      5,025                   3,230
<CURRENT-ASSETS>                                34,631                   8,609
<PP&E>                                          19,060                  15,429
<DEPRECIATION>                                (12,946)                (11,007)
<TOTAL-ASSETS>                                  48,130                  19,551
<CURRENT-LIABILITIES>                            4,172                   3,550
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           154                     118
<OTHER-SE>                                      43,805                  12,741
<TOTAL-LIABILITY-AND-EQUITY>                    48,130                  19,551
<SALES>                                          1,888                   5,013
<TOTAL-REVENUES>                                11,257                  15,129
<CGS>                                            1,914                   4,603
<TOTAL-COSTS>                                   12,021                  14,333
<OTHER-EXPENSES>                                16,488                  13,551
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                (10)                     239
<INCOME-PRETAX>                               (15,326)                (12,378)
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                           (15,326)                (12,378)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                  (15,326)                (12,378)
<EPS-BASIC>                                   (1.01)                  (1.06)
<EPS-DILUTED>                                   (1.01)                  (1.06)