<ARTICLE>      5
<MULTIPLIER>   1,000
       
                                                
<PERIOD-TYPE>                                      6-MOS
<FISCAL-YEAR-END>                                  DEC-31-1997
<PERIOD-START>                                     JAN-01-1997
<PERIOD-END>                                       JUN-30-1997
<CASH>                                                   4,272
<SECURITIES>                                            27,972
<RECEIVABLES>                                            2,769
<ALLOWANCES>                                                 0
<INVENTORY>                                              1,993
<CURRENT-ASSETS>                                        37,371
<PP&E>                                                  12,561
<DEPRECIATION>                                           4,721
<TOTAL-ASSETS>                                          45,240
<CURRENT-LIABILITIES>                                    2,176
<BONDS>                                                      0
<PREFERRED-MANDATORY>                                        0
<PREFERRED>                                                  0
<COMMON>                                                   298
<OTHER-SE>                                             105,765
<TOTAL-LIABILITY-AND-EQUITY>                            45,240
<SALES>                                                  7,090
<TOTAL-REVENUES>                                         7,495
<CGS>                                                    3,843
<TOTAL-COSTS>                                            3,843
<OTHER-EXPENSES>                                             0
<LOSS-PROVISION>                                             0
<INTEREST-EXPENSE>                                           0
<INCOME-PRETAX>                                         (3,869)
<INCOME-TAX>                                                 0
<INCOME-CONTINUING>                                     (3,869)
<DISCONTINUED>                                               0
<EXTRAORDINARY>                                              0
<CHANGES>                                                    0
<NET-INCOME>                                            (3,869)
<EPS-PRIMARY>                                             (.13)
<EPS-DILUTED>                                             (.13)