<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE AUDITED FINANCIAL STATEMENTS FILED IN THE COMPANY'S ANNUAL REPORT ON FORM 10-K AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH AUDITED FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS 6-MOS <FISCAL-YEAR-END> DEC-31-1997 DEC-31-1996 <PERIOD-START> APR-01-1997 APR-01-1996 <PERIOD-END> JUN-30-1997 JUN-30-1996 <CASH> 5,970 98 <SECURITIES> 5,463 7,574 <RECEIVABLES> 1,902 664 <ALLOWANCES> 0 0 <INVENTORY> 0 0 <CURRENT-ASSETS> 13,433 8,656 <PP&E> 6,768 5,666 <DEPRECIATION> 4,923 3,957 <TOTAL-ASSETS> 15,314 10,401 <CURRENT-LIABILITIES> 2,431 1,473 <BONDS> 1,340 1,176 <PREFERRED-MANDATORY> 0 0 <PREFERRED> 0 0 <COMMON> 58,242 48,140 <OTHER-SE> (46,081) (39,666) <TOTAL-LIABILITY-AND-EQUITY> 12,160 8,474 <SALES> 0 0 <TOTAL-REVENUES> 1,471 759 <CGS> 0 0 <TOTAL-COSTS> 3,531 2,501 <OTHER-EXPENSES> 0 0 <LOSS-PROVISION> 0 0 <INTEREST-EXPENSE> 61 44 <INCOME-PRETAX> (2,121) (1,786) <INCOME-TAX> 0 0 <INCOME-CONTINUING> (2,121) (1,786) <DISCONTINUED> 0 0 <EXTRAORDINARY> 0 0 <CHANGES> 0 0 <NET-INCOME> (2,121) (1,786) <EPS-PRIMARY> (0.11) (0.12) <EPS-DILUTED> (0.11) (0.12)