<ARTICLE> 5 <RESTATED> <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> MAR-31-1997 <PERIOD-START> APR-01-1996 <PERIOD-END> JUN-30-1996 <EXCHANGE-RATE> 1 <CASH> 1,833 <SECURITIES> 20,711 <RECEIVABLES> 3,509 <ALLOWANCES> 0 <INVENTORY> 2,089 <CURRENT-ASSETS> 8,055 <PP&E> 10,682 <DEPRECIATION> 6,866 <TOTAL-ASSETS> 33,072 <CURRENT-LIABILITIES> 3,736 <BONDS> 3,191 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 105 <OTHER-SE> 25,851 <TOTAL-LIABILITY-AND-EQUITY> 33,072 <SALES> 1,354 <TOTAL-REVENUES> 2,856 <CGS> 1,413 <TOTAL-COSTS> 2,554 <OTHER-EXPENSES> 3,962 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 92 <INCOME-PRETAX> (3,445) <INCOME-TAX> 0 <INCOME-CONTINUING> (3,445) <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (3,445) <EPS-PRIMARY> (0.33) <EPS-DILUTED> (0.33)