<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) AT, AND FOR THE THREE MONTHS ENDED
MARCH 31, 2000, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          MAR-31-2000
<PERIOD-END>                               DEC-31-1999
<CASH>                                      27,328,000
<SECURITIES>                                 7,252,000
<RECEIVABLES>                               10,160,000
<ALLOWANCES>                                   164,000
<INVENTORY>                                  7,165,000
<CURRENT-ASSETS>                             2,311,000
<PP&E>                                      13,482,000
<DEPRECIATION>                               5,530,000
<TOTAL-ASSETS>                              72,840,000
<CURRENT-LIABILITIES>                       13,866,000
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       166,000
<OTHER-SE>                                  58,607,000
<TOTAL-LIABILITY-AND-EQUITY>                72,840,000
<SALES>                                     14,404,000
<TOTAL-REVENUES>                            38,223,000
<CGS>                                       10,660,000
<TOTAL-COSTS>                               32,752,000
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                              5,885,000
<INCOME-TAX>                                   311,000
<INCOME-CONTINUING>                          5,574,000
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 5,574,000
<EPS-BASIC>                                       0.36
<EPS-DILUTED>                                     0.35