<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          JAN-31-1997             JAN-31-1997             JAN-31-1997
<PERIOD-START>                             FEB-01-1996             MAY-01-1996             AUG-01-1996
<PERIOD-END>                               APR-30-1996             JUL-31-1996             OCT-31-1996
<CASH>                                           3,912                   8,281                   3,330
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                    3,519                   3,920                   3,975
<ALLOWANCES>                                       487                     512                     615
<INVENTORY>                                        360                     825                     630
<CURRENT-ASSETS>                                 7,372                  10,577                   7,423
<PP&E>                                          11,309                  12,006                  19,266
<DEPRECIATION>                                   2,084                   2,624                   3,489
<TOTAL-ASSETS>                                  16,657                  20,015                  23,252
<CURRENT-LIABILITIES>                            2,992                   3,102                   5,961
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                            36                      44                      44
<OTHER-SE>                                       9,938                  13,118                  13,692
<TOTAL-LIABILITY-AND-EQUITY>                    16,657                  20,015                  23,252
<SALES>                                            466                   1,398                   2,007
<TOTAL-REVENUES>                                 2,270                   4,344                   7,363
<CGS>                                              373                     894                   1,261
<TOTAL-COSTS>                                    1,452                   1,005                   1,372
<OTHER-EXPENSES>                                    29                   2,017                   3,568
<LOSS-PROVISION>                                   487                     153                     418
<INTEREST-EXPENSE>                                  66                     191                     289
<INCOME-PRETAX>                                    789                   1,363                   2,472
<INCOME-TAX>                                       284                     490                     854
<INCOME-CONTINUING>                                505                     873                   1,618
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                       505                     873                   1,618
<EPS-PRIMARY>                                      .15                     .23                     .40
<EPS-DILUTED>                                      .13                     .20                     .37
        

</TABLE>