
<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the Form
10-Q for the period December 31, 1996 and is qualified in its entirety by
reference to such financial statements.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-END>                               DEC-31-1996
<CASH>                                      20,861,964
<SECURITIES>                                 1,957,953
<RECEIVABLES>                               11,886,106
<ALLOWANCES>                                  (25,000)
<INVENTORY>                                  3,689,023
<CURRENT-ASSETS>                            42,293,494
<PP&E>                                      28,251,054
<DEPRECIATION>                            (22,006,796)
<TOTAL-ASSETS>                              49,322,072
<CURRENT-LIABILITIES>                        6,412,834
<BONDS>                                      1,458,536
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       107,434
<OTHER-SE>                                  37,748,860
<TOTAL-LIABILITY-AND-EQUITY>                49,322,072
<SALES>                                      8,853,296
<TOTAL-REVENUES>                            16,756,453
<CGS>                                        9,681,904
<TOTAL-COSTS>                                1,991,125
<OTHER-EXPENSES>                            11,665,836
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             183,994
<INCOME-PRETAX>                            (5,917,614)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                        (5,917,614)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (5,917,614)
<EPS-PRIMARY>                                    (.55)
<EPS-DILUTED>                                    (.55)
        

</TABLE>
