<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5

<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   YEAR                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-START>                             JAN-01-1996             JAN-01-1996             APR-01-1996             JUL-01-1996
<PERIOD-END>                               DEC-31-1996             MAR-31-1996             JUN-30-1996             SEP-30-1996
<CASH>                                         328,331                 262,382              19,251,356              18,565,290
<SECURITIES>                                17,817,917                       0                 500,000                 500,000
<RECEIVABLES>                                   38,196                 156,529                 104,542                 107,630
<ALLOWANCES>                                    20,000                       0                       0                       0
<INVENTORY>                                    279,789                 155,293                 175,411                 182,692
<CURRENT-ASSETS>                            18,566,626                 695,659              20,049,924              19,377,864
<PP&E>                                         492,838                 264,807                 325,193                 348,418
<DEPRECIATION>                                 284,739                 195,522                 220,157                 249,928
<TOTAL-ASSETS>                              19,151,982               1,054,684              20,467,685              19,816,600
<CURRENT-LIABILITIES>                        1,576,367               1,628,672               1,268,611               1,413,298
<BONDS>                                              0                       0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                   4,028                       0                       0
<COMMON>                                         5,580                     146                   5,551                   5,552
<OTHER-SE>                                  17,570,035               (622,780)              19,171,285              18,389,221
<TOTAL-LIABILITY-AND-EQUITY>                19,151,982               1,054,684              20,467,685              19,816,600
<SALES>                                        413,698                 136,226                  78,732                  94,094
<TOTAL-REVENUES>                               413,698                 136,226                  78,732                  94,094
<CGS>                                        1,189,510                 295,181                 292,841                 312,283
<TOTAL-COSTS>                                4,031,442                 805,517                 893,853               1,147,653
<OTHER-EXPENSES>                                     0                       0                       0                       0
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                              90,090                   7,869                  40,080                  21,405
<INCOME-PRETAX>                            (3,024,373)               (673,153)               (687,686)               (784,332)
<INCOME-TAX>                                         0                       0                       0                       0
<INCOME-CONTINUING>                                  0                       0                       0                       0
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                               (3,024,373)               (673,153)               (687,686)               (784,332)
<EPS-PRIMARY>                                    (.80)                   (.20)                   (.14)                   (.14)
<EPS-DILUTED>                                    (.80)                   (.20)                   (.14)                   (.14)


</TABLE>