<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS RESTATED SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
CONSOLIDATED BALANCE SHEET AND CONSOLIDATED STATEMENT OF OPERATIONS OF
PREVIOUSLY FILED FORM 10-Q AND FORM 10-K AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS. THE RESTATEMENT IS REQUIRED DUE TO THE
ADOPTION OF FASB STATEMENT 123, EARNINGS PER SHARE, AND SEC:SAB 98, EARNINGS PER
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   3-MOS                   3-MOS                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996             DEC-31-1995
<PERIOD-START>                             JAN-01-1996             APR-01-1996             JUL-01-1996             JAN-01-1995
<PERIOD-END>                               MAR-31-1996             JUN-30-1996             SEP-30-1996             DEC-31-1995
<CASH>                                             329                     329                     329                     756
<SECURITIES>                                         0                       0                       0                       0
<RECEIVABLES>                                    7,845                   7,845                   7,845                   3,204
<ALLOWANCES>                                       640                     640                     640                     263
<INVENTORY>                                      4,835                   4,835                   4,835                   2,143
<CURRENT-ASSETS>                                12,964                  12,964                  12,964                   6,593
<PP&E>                                           9,159                   9,159                   9,159                   7,613
<DEPRECIATION>                                   6,102                   6,102                   6,102                   4,966
<TOTAL-ASSETS>                                  17,897                  17,897                  17,897                  10,639
<CURRENT-LIABILITIES>                           11,342                  11,342                  11,342                   6,157
<BONDS>                                              0                       0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                             1                       1                       1                       1
<OTHER-SE>                                      28,019                  28,019                  28,019                  28,019
<TOTAL-LIABILITY-AND-EQUITY>                    17,897                  17,897                  17,897                  10,639
<SALES>                                          5,329                   5,049                   3,040                  12,632
<TOTAL-REVENUES>                                 5,790                   5,556                   3,776                  14,221
<CGS>                                            3,169                   3,022                   1,757                   8,803
<TOTAL-COSTS>                                    3,469                   3,342                   2,185                   9,676
<OTHER-EXPENSES>                                 2,990                   3,219                   3,724                  10,141
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                                 219                     253                     262                     530
<INCOME-PRETAX>                                   (888)                 (1,253)                 (2,390)                 (6,136)
<INCOME-TAX>                                      (319)                   (354)                   (781)                 (2,138)
<INCOME-CONTINUING>                               (569)                   (899)                 (1,609)                 (3,998)
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                      (569)                   (899)                 (1,609)                 (3,998)
<EPS-PRIMARY>                                     (.18)                   (.28)                   (.50)                  (1.23)
<EPS-DILUTED>                                     (.18)                   (.28)                   (.50)                  (1.23)


</TABLE>