<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
consolidated balance sheets, statements of operations and statements of cash
flows included in the Company's Form 10-Q for the period ended March 31, 1999,
and is qualified in its entirety by reference to such financial statements and
notes thereto.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               MAR-31-1999
<CASH>                                          28,760
<SECURITIES>                                    35,277
<RECEIVABLES>                                    4,529
<ALLOWANCES>                                         0
<INVENTORY>                                        766
<CURRENT-ASSETS>                                72,428
<PP&E>                                          52,094
<DEPRECIATION>                                (30,464)
<TOTAL-ASSETS>                                 100,777
<CURRENT-LIABILITIES>                           22,480
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       290,942
<OTHER-SE>                                      53,329
<TOTAL-LIABILITY-AND-EQUITY>                   100,777
<SALES>                                          3,142
<TOTAL-REVENUES>                                 8,662
<CGS>                                              548
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                19,126
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 507
<INCOME-PRETAX>                                (7,748)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            (7,748)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (7,748)
<EPS-PRIMARY>                                    (.26)
<EPS-DILUTED>                                    (.26)