<ARTICLE>       5
<LEGEND>
The schedule contains summary financial information extracted from quarterly 
financial statements for the six months ended June 30, 1995 and is 
qualified in its entirety by reference to such financial statements.
       
                                                              
<FISCAL-YEAR-END>                                                      DEC-31-1995
<PERIOD-END>                                                           JUN-30-1995
<PERIOD-TYPE>                                                                6-MOS
<CASH>                                                                  35,363,968
<SECURITIES>                                                            18,270,119
<RECEIVABLES>                                                            5,871,998
<ALLOWANCES>                                                            (1,006,000)
<INVENTORY>                                                              3,696,292
<CURRENT-ASSETS>                                                        63,790,016
<PP&E>                                                                  14,196,155
<DEPRECIATION>                                                          (6,862,706)
<TOTAL-ASSETS>                                                          80,842,656
<CURRENT-LIABILITIES>                                                   10,130,291
<BONDS>                                                                          0
<PREFERRED-MANDATORY>                                                            0 
<PREFERRED>                                                                      0
<COMMON>                                                                   584,724
<OTHER-SE>                                                              48,890,089
<TOTAL-LIABILITY-AND-EQUITY>                                            80,842,656
<SALES>                                                                 26,287,478
<TOTAL-REVENUES>                                                        31,768,371
<CGS>                                                                   11,026,972
<TOTAL-COSTS>                                                           11,026,972
<OTHER-EXPENSES>                                                           359,328
<LOSS-PROVISION>                                                                 0
<INTEREST-EXPENSE>                                                               0
<INCOME-PRETAX>                                                         12,539,491
<INCOME-TAX>                                                             4,820,000
<INCOME-CONTINUING>                                                      7,719,491
<DISCONTINUED>                                                                   0
<EXTRAORDINARY>                                                                  0
<CHANGES>                                                                        0
<NET-INCOME>                                                             7,719,491
<EPS-PRIMARY>                                                                 1.95
<EPS-DILUTED>                                                                    0