<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEET AND CONDENSED CONSOLIDATED STATEMENT OF
INCOME AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<MULTIPLIER>                                   1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                              MAR-31-2001
<PERIOD-START>                                 APR-01-2000
<PERIOD-END>                                   DEC-31-2000
<CASH>                                               1,565
<SECURITIES>                                         9,250
<RECEIVABLES>                                        1,413
<ALLOWANCES>                                          (387)
<INVENTORY>                                          4,529
<CURRENT-ASSETS>                                    17,005
<PP&E>                                              18,871
<DEPRECIATION>                                     (13,176)
<TOTAL-ASSETS>                                      29,409
<CURRENT-LIABILITIES>                                3,561
<BONDS>                                                  0
<PREFERRED-MANDATORY>                                    0
<PREFERRED>                                              0
<COMMON>                                                99
<OTHER-SE>                                          25,749
<TOTAL-LIABILITY-AND-EQUITY>                        29,409
<SALES>                                             15,747
<TOTAL-REVENUES>                                    15,747
<CGS>                                                8,164
<TOTAL-COSTS>                                        8,164
<OTHER-EXPENSES>                                     4,630
<LOSS-PROVISION>                                         0
<INTEREST-EXPENSE>                                       0
<INCOME-PRETAX>                                      3,392
<INCOME-TAX>                                        (1,487)
<INCOME-CONTINUING>                                  4,879
<DISCONTINUED>                                           0
<EXTRAORDINARY>                                          0
<CHANGES>                                                0
<NET-INCOME>                                         4,879
<EPS-BASIC>                                            .49
<EPS-DILUTED>                                          .47