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Long-Lived Assets - Goodwill (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Apr. 27, 2013
Goodwill  
Balance as of April 28, 2012: $ 3,347
Foreign currency translation (41)
Balance as of April 27, 2013: 3,306
Live Events
 
Goodwill  
Balance as of April 28, 2012: 2,435
Foreign currency translation (18)
Balance as of April 27, 2013: 2,417
Commerical
 
Goodwill  
Balance as of April 28, 2012: 741
Foreign currency translation (16)
Balance as of April 27, 2013: 725
Transportation
 
Goodwill  
Balance as of April 28, 2012: 171
Foreign currency translation (7)
Balance as of April 27, 2013: $ 164