<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEETS AT DECEMBER 31, 1997 (UNAUDITED) AND THE
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS FOR THE NINE MONTHS ENDED
DECEMBER 31, 1997 (UNAUDITED) AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          MAR-31-1998
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                           4,191
<SECURITIES>                                         0
<RECEIVABLES>                                    1,186
<ALLOWANCES>                                         0
<INVENTORY>                                      1,416
<CURRENT-ASSETS>                                 7,042
<PP&E>                                          14,493
<DEPRECIATION>                                  12,115
<TOTAL-ASSETS>                                  10,242
<CURRENT-LIABILITIES>                            2,175
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            95
<OTHER-SE>                                      34,542
<TOTAL-LIABILITY-AND-EQUITY>                    10,242
<SALES>                                          7,606
<TOTAL-REVENUES>                                 7,620
<CGS>                                            4,214
<TOTAL-COSTS>                                    4,214
<OTHER-EXPENSES>                                 2,508
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   5
<INCOME-PRETAX>                                  1,013
<INCOME-TAX>                                        35
<INCOME-CONTINUING>                                978
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       978
<EPS-PRIMARY>                                     0.10
<EPS-DILUTED>                                     0.10