Exhibit 11.1 Statement re Computation of net loss per share and unaudited pro forma net loss per share Year ended December 31, 1996 1997 1998 ---- ---- ---- (in thousands, except per share data) Basic and diluted net loss per share: Net loss $ (1,698) $ (7,425) $(10,770) ========= ========= ======== Basic and diluted weighted average common shares outstanding 1,743 1,687 2,938 ========= ========= ======== Basic and diluted net loss per share $ (0.97) $ (4.40) $ (3.67) ========= ========= ======== Year ended December 31, 1997 1998 ---- ---- (in thousands, except per share data) Unaudited pro forma basic and diluted net loss per share: Net loss $ (7,425) $(10,770) ======== ======== Unaudited pro forma basic and diluted weighted average shares outstanding: Shares attributable to common stock (1) 2,515 3,321 Shares attributable to the assumed conversion of Preferred Stock upon closing of an initial public offering 2,863 3,818 -------- -------- Unaudited pro forma basic and diluted weighted average shares 5,378 7,139 ======== ======== Unaudited pro forma basic and diluted net loss per share $ (1.38) $ (1.51) ======== ======== (1) Includes outstanding common stock subject to repurchase under a stock restriction agreement which lapsed upon the consummation of the initial public offering in January 1999.