<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from Statements
of Operations, Balance Sheets, Statements of Cash Flows and Statement of
Shareholders' Equity, and is qualified in its entirety by reference to such
financial statements.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   6-MOS                   9-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-END>                               JUN-30-1996             SEP-30-1996             DEC-31-1996
<CASH>                                          14,876                  16,350                   9,112
<SECURITIES>                                         0                       0                   8,563
<RECEIVABLES>                                    3,117                   2,790                   1,724
<ALLOWANCES>                                     (158)                   (173)                   (179)
<INVENTORY>                                      4,856                   4,568                     451
<CURRENT-ASSETS>                                23,146                  24,164                  21,271
<PP&E>                                          24,407                  24,434                  17,740
<DEPRECIATION>                                (18,794)                (19,538)                (13,431)
<TOTAL-ASSETS>                                  29,667                  30,482                  26,312
<CURRENT-LIABILITIES>                            9,928                   8,137                   5,114
<BONDS>                                          4,019                   4,018                   4,056
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                           261                     261                      50
<OTHER-SE>                                       7,703                  10,392                  16,867
<TOTAL-LIABILITY-AND-EQUITY>                    29,667                  30,482                  26,312
<SALES>                                            501                     713                     890
<TOTAL-REVENUES>                                 3,334                   5,169                   6,573
<CGS>                                              615                     815                   1,468
<TOTAL-COSTS>                                    3,378                   4,657                   6,718
<OTHER-EXPENSES>                                 3,313                   5,796                   7,136
<LOSS-PROVISION>                                    15                      15                      50
<INTEREST-EXPENSE>                                  10                      14                     114
<INCOME-PRETAX>                                (2,095)                     377                 (1,110)
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                            (2,095)                     377                 (1,110)
<DISCONTINUED>                                   6,113                   6,330                   9,109
<EXTRAORDINARY>                                      0                       0                 (2,040)
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     4,018                   6,707                   5,960
<EPS-PRIMARY>                                     1.17                    1.95                    1.60
<EPS-DILUTED>                                     1.17                    1.90                    1.60<F1>
<FN>
<F1>The EPS calculations reflect the Company's adoptions of FAS 128, "Earnings per
Share".  This FASB Statement uses a revised method of calculating EPS,
replacing the terms "Primary" and "Fully diluted" with "Basic" and "Diluted".
</FN>
        

</TABLE>