<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   YEAR                   9-MOS                   6-MOS                   3-MOS
<FISCAL-YEAR-END>                          MAR-31-1999             MAR-31-1999             MAR-31-1999             MAR-31-1999
<PERIOD-START>                             APR-01-1998             APR-01-1998             APR-01-1998             APR-01-1998
<PERIOD-END>                               MAR-31-1999             DEC-31-1998             SEP-30-1998             JUN-30-1998
<CASH>                                          27,159                  29,246                  28,243                  30,085
<SECURITIES>                                     1,077                     383                     539                     957
<RECEIVABLES>                                    2,541                   2,832                   7,756                   8,018
<ALLOWANCES>                                        15                      27                      27                      27
<INVENTORY>                                          0                       0                       0                       0
<CURRENT-ASSETS>                                36,585                  33,288                  38,448                  40,984
<PP&E>                                             214                  32,420                  30,420                  27,228
<DEPRECIATION>                                      92                   2,252                   1,963                   1,795
<TOTAL-ASSETS>                                  89,557                 115,769                 112,586                 115,512
<CURRENT-LIABILITIES>                            3,365                   5,804                   6,107                   7,805
<BONDS>                                          9,001                  33,927                  32,025                  27,299
<PREFERRED-MANDATORY>                          243,169                 235,871                 228,744                 221,787
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                        69,032                  69,032                  69,032                  69,032
<OTHER-SE>                                   (246,965)               (241,239)               (235,988)               (223,289)
<TOTAL-LIABILITY-AND-EQUITY>                    89,557                 115,769                 112,586                 115,512
<SALES>                                              0                       0                       0                       0
<TOTAL-REVENUES>                                     0                       0                       0                       0
<CGS>                                                0                       0                       0                       0
<TOTAL-COSTS>                                        0                       0                       0                       0
<OTHER-EXPENSES>                                     0                       0                       0                       0
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                                 768                     584                     395                     206
<INCOME-PRETAX>                                (6,571)                 (6,239)                 (5,935)                 (3,036)
<INCOME-TAX>                                         0                       0                       0                       0
<INCOME-CONTINUING>                            (6,571)                 (6,239)                 (5,935)                 (3,036)
<DISCONTINUED>                                    (16)                     235                     569                     454
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                   (6,587)                 (6,004)                 (5,366)                 (2,582)
<EPS-BASIC>                                     (2.65)                  (2.05)                  (1.45)                  (0.70)
<EPS-DILUTED>                                   (2.65)                  (2.05)                  (1.45)                  (0.70)


</TABLE>