Exhibit 11

                        COMPUTATION OF LOSS PER SHARE 
                    (in thousands except per share amounts)

 
 
                                         Three Months Ended           Six Months Ended                
                                              June 30,                    June 30,                    
                                         -------------------        -------------------               
                                           1997      1996             1997       1996                 
                                         --------  ---------        ---------  --------               
                                                                                       
Net loss attributable to common                                                                       
 stockholders                            $(2,155)   $(2,658)         $(4,424)  $(5,504)               
                                         =======   ========         ========   =======                
                                                                                                      
Weighted average shares used to                                                                       
 compute net loss per share                                                                           
                                                                                                      
Weighted average number of                                                                            
 shares outstanding:                                                                                  
                                                                                                      
Convertible Preferred Stock                    -      7,091                -     6,398                
                                                                                                      
Common Stock                              10,477        574           10,471       572                
                                                                                                      
Number of common equivalents                                                                          
 as a result of warrants granted                                                                      
 using the treasury stock method                                                                      
 in accordance with Staff                                                                             
 Accounting Bulletin 83                        -          -                -        93                
                                                                                                      
Number of common equivalents                                                                          
 as a result of stock options granted                                                                 
 using the treasury stock method                                                                      
 in accordance with Staff                                                                             
 Accounting Bulletin 83                        -          -                -       237                
                                         -------   --------         --------   -------                
                                                                                                      
Total                                     10,477      7,665           10,471     7,300                
                                         =======   ========         ========   =======                
                                                                                                      
Net loss per share attributable                                                                       
 to common stockholders                  $ (0.21)   $ (0.35)         $ (0.42)   $(0.75)               
                                         =======   ========         ========   =======                 


The calculations for all periods shown include the shares and warrants of
convertible preferred stock as if they had converted to common stock on their
respective original dates of issuance, because such shares automatically
converted to common stock upon the closing of the Initial Public Offering of the
Company's common stock.