Energy Recovery, Inc. | 2013 | FY | 3


   

Years Ended

December 31,

 
   

2013

   

2012

   

2011

 

Outstanding, beginning of period

    950       970       970  

Exercised during the period

    (280 )     (20 )      

Cancelled during the period

    (20 )            

Outstanding, end of period

    650       950       970  

Weighted average exercise price of warrants outstanding at end of period

  $ 1.00     $ 0.90     $ 0.88  

Weighted average remaining contractual life, in years, of warrants outstanding at end of period

    1.0       1.9       2.8  

us-gaap:ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock