<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AND CONSOLIDATED STATEMENT OF OPERATIONS AS RESTATED
FOUND ON PAGES 2 OR 3 OF THE COMPANY'S FORM 10-Q FOR THE YEAR TO DATE JUNE 30,
1997, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                           6,696
<SECURITIES>                                         0
<RECEIVABLES>                                    3,630
<ALLOWANCES>                                         0
<INVENTORY>                                        411
<CURRENT-ASSETS>                                11,551
<PP&E>                                           7,486
<DEPRECIATION>                                   5,365
<TOTAL-ASSETS>                                  21,397
<CURRENT-LIABILITIES>                            8,135
<BONDS>                                              0
<PREFERRED-MANDATORY>                            2,686
<PREFERRED>                                          0
<COMMON>                                        61,639
<OTHER-SE>                                    (55,587)
<TOTAL-LIABILITY-AND-EQUITY>                    21,397
<SALES>                                          8,739
<TOTAL-REVENUES>                                 8,739
<CGS>                                            4,945
<TOTAL-COSTS>                                    4,945
<OTHER-EXPENSES>                                 1,946
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               (109)
<INCOME-PRETAX>                                (3,864)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            (3,864)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (3,864)
<EPS-PRIMARY>                                    (.40)
<EPS-DILUTED>                                    (.40)