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INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Dec. 31, 2010
Inventory Disclosure [Abstract]            
Finished goods $ 3,333   $ 2,608      
Raw materials and work in process 1,563   1,485      
Demonstration inventory 91   277      
Inventory, gross 4,987   4,370      
Allowance for obsolescence (581) (559) (511) (514) (520) (518)
Inventories, net $ 4,406   $ 3,859