<ARTICLE>                     5
<LEGEND>
THIS  SCHEDULE  CONTAINS  SUMMARY  FINANCIAL   INFORMATION  EXTRACTED  FROM  THE
CONSOLIDATED  FINANCIAL STATEMENTS  (UNAUDITED) AT, AND FOR THE SIX MONTHS ENDED
JUNE 30, 1998,  AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH  FINANCIAL
STATEMENTS.
</LEGEND>
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                              DEC-31-1998
<PERIOD-END>                                   JUN-30-1998
<CASH>                                           8,996,000 
<SECURITIES>                                    21,111,000 
<RECEIVABLES>                                    3,997,000 
<ALLOWANCES>                                       262,000 
<INVENTORY>                                      5,704,000 
<CURRENT-ASSETS>                                41,373,000 
<PP&E>                                           6,456,000 
<DEPRECIATION>                                   3,199,000 
<TOTAL-ASSETS>                                  45,953,000 
<CURRENT-LIABILITIES>                            7,576,000 
<BONDS>                                                  0 
<PREFERRED-MANDATORY>                                    0 
<PREFERRED>                                              0 
<COMMON>                                           165,000 
<OTHER-SE>                                      38,196,000 
<TOTAL-LIABILITY-AND-EQUITY>                    45,953,000 
<SALES>                                         19,073,000 
<TOTAL-REVENUES>                                47,270,000 
<CGS>                                           12,923,000 
<TOTAL-COSTS>                                   39,458,000 
<OTHER-EXPENSES>                                         0 
<LOSS-PROVISION>                                     4,000 
<INTEREST-EXPENSE>                                   7,000 
<INCOME-PRETAX>                                  8,561,000 
<INCOME-TAX>                                       481,000 
<INCOME-CONTINUING>                              8,080,000 
<DISCONTINUED>                                           0 
<EXTRAORDINARY>                                          0 
<CHANGES>                                                0 
<NET-INCOME>                                     8,080,000 
<EPS-PRIMARY>                                         0.49 
<EPS-DILUTED>                                         0.47