<ARTICLE>                     5
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                              Dec-31-1996
<PERIOD-END>                                   Jun-30-1997
<CASH>                                            183
<SECURITIES>                                   31,228
<RECEIVABLES>                                       0
<ALLOWANCES>                                        0
<INVENTORY>                                         0
<CURRENT-ASSETS>                               32,608
<PP&E>                                         29,610
<DEPRECIATION>                                 24,926
<TOTAL-ASSETS>                                 41,867
<CURRENT-LIABILITIES>                           8,769
<BONDS>                                             0
<PREFERRED-MANDATORY>                               0
<PREFERRED>                                         0
<COMMON>                                           20
<OTHER-SE>                                     18,393
<TOTAL-LIABILITY-AND-EQUITY>                   41,867
<SALES>                                             0
<TOTAL-REVENUES>                                  293
<CGS>                                               0
<TOTAL-COSTS>                                       0 
<OTHER-EXPENSES>                                9,225
<LOSS-PROVISION>                                    0
<INTEREST-EXPENSE>                                263
<INCOME-PRETAX>                                (8,665)
<INCOME-TAX>                                        0
<INCOME-CONTINUING>                            (8,665)
<DISCONTINUED>                                      0
<EXTRAORDINARY>                                     0
<CHANGES>                                           0
<NET-INCOME>                                   (8,665)
<EPS-PRIMARY>                                   (0.22)
<EPS-DILUTED>                                   (0.22)