<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEETS AT SEPTEMBER 30, 1998 (UNAUDITED) AND THE
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS FOR THE SIX MONTHS ENDED
SEPTEMBER 30, 1998 (UNAUDITED) AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAR-31-1999
<PERIOD-START>                             APR-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                           7,638
<SECURITIES>                                         0
<RECEIVABLES>                                      962
<ALLOWANCES>                                     (264)
<INVENTORY>                                      1,497
<CURRENT-ASSETS>                                10,073
<PP&E>                                          16,025
<DEPRECIATION>                                  12,519
<TOTAL-ASSETS>                                  14,492
<CURRENT-LIABILITIES>                            1,814
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            98
<OTHER-SE>                                      12,580
<TOTAL-LIABILITY-AND-EQUITY>                    14,492
<SALES>                                          7,507
<TOTAL-REVENUES>                                 7,507
<CGS>                                            3,692
<TOTAL-COSTS>                                    3,692
<OTHER-EXPENSES>                                 1,925
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   3
<INCOME-PRETAX>                                  2,027
<INCOME-TAX>                                        59
<INCOME-CONTINUING>                              1,968
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     1,968
<EPS-PRIMARY>                                      .20
<EPS-DILUTED>                                      .20