EXHIBIT 11 Computation of Pro Forma Net Loss Per Common Share (In thousands, except per share data) Year Ended December 31, ----------------------------------------------- 1995 1996 1997 ------- ------- ------- Net loss ............................... $(5,067) $(6,141) $(9,064) ======= ======= ======= Basic and diluted weighted-average shares outstanding...................... 2,550 7,494 9,405 ======= ======= ======= Basic and diluted net loss per share.... $ (1.99) $ (0.82) $ (0.96) ======= ======= =======