<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                          11,035
<SECURITIES>                                    10,910
<RECEIVABLES>                                   16,389
<ALLOWANCES>                                         0
<INVENTORY>                                      8,723
<CURRENT-ASSETS>                                48,881
<PP&E>                                          50,186
<DEPRECIATION>                                  10,336
<TOTAL-ASSETS>                                  88,731
<CURRENT-LIABILITIES>                           10,303
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           146
<OTHER-SE>                                      75,493
<TOTAL-LIABILITY-AND-EQUITY>                    88,731
<SALES>                                         22,617
<TOTAL-REVENUES>                                22,617
<CGS>                                           11,100
<TOTAL-COSTS>                                   11,100
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                  9,355
<INCOME-TAX>                                     3,563
<INCOME-CONTINUING>                              5,792
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     5,792
<EPS-PRIMARY>                                      .40
<EPS-DILUTED>                                      .39