<ARTICLE> 5
<MULTIPLIER> 1
<CURRENCY> U.S. DOLLARS

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                              JAN-1-1999
<PERIOD-END>                               JUN-30-1999
<EXCHANGE-RATE>                                      1
<CASH>                                       7,814,696
<SECURITIES>                                70,657,590
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                  3,186,113
<CURRENT-ASSETS>                            95,175,489
<PP&E>                                      11,970,610
<DEPRECIATION>                               4,257,691
<TOTAL-ASSETS>                             113,475,147
<CURRENT-LIABILITIES>                        5,291,103
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       168,652
<OTHER-SE>                                 102,809,212
<TOTAL-LIABILITY-AND-EQUITY>               113,475,147
<SALES>                                              0
<TOTAL-REVENUES>                             4,713,266
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                            19,986,673
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             259,720
<INCOME-PRETAX>                           (17,152,934)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                       (17,152,934)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                              (17,152,934)
<EPS-BASIC>                                   (1.02)
<EPS-DILUTED>                                   (1.02)