<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000
<S> <C> <C> <C>
<PERIOD-TYPE> YEAR YEAR YEAR
<FISCAL-YEAR-END> APR-30-2000 APR-30-1999 APR-30-1998
<PERIOD-START> MAY-01-1999 MAY-01-1998 MAY-01-1997
<PERIOD-END> APR-30-2000 APR-30-1999 APR-30-1998
<CASH> 537 550 0
<SECURITIES> 0 0 0
<RECEIVABLES> 12,388 9,215 0
<ALLOWANCES> 261 184 0
<INVENTORY> 11,172 6,916 0
<CURRENT-ASSETS> 25,203 17,175 0
<PP&E> 38,377 22,842 0
<DEPRECIATION> 13,442 10,311 0
<TOTAL-ASSETS> 61,137 31,523 0
<CURRENT-LIABILITIES> 7,456 5,181 0
<BONDS> 0 0 0
0 0 0
0 0 0
<COMMON> 0 0 0
<OTHER-SE> 52,962 26,169 0
<TOTAL-LIABILITY-AND-EQUITY> 61,137 31,523 0
<SALES> 71,785 46,458 24,158
<TOTAL-REVENUES> 73,244 46,508 24,346
<CGS> 48,064 29,543 17,656
<TOTAL-COSTS> 19,130 11,333 8,118
<OTHER-EXPENSES> 0 0 0
<LOSS-PROVISION> 138 200 77
<INTEREST-EXPENSE> 0 0 0
<INCOME-PRETAX> 6,050 5,632 (1,428)
<INCOME-TAX> 2,260 2,130 (570)
<INCOME-CONTINUING> 3,790 3,502 (858)
<DISCONTINUED> 0 0 0
<EXTRAORDINARY> 0 0 0
<CHANGES> 0 0 0
<NET-INCOME> 3,790 3,502 (858)
<EPS-BASIC> 0 0 0
<EPS-DILUTED> 0 0 0
</TABLE>