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Segment Disclosure - Net Income by Segment (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Jul. 28, 2012
segment
Jul. 30, 2011
Segment Reporting Information    
Number of business units 5  
Net sales $ 132,919 $ 118,698
Contribution margin 23,310 17,298
Non-allocated operating expenses:    
General and administrative 6,581 6,464
Product design and development 6,021 5,718
Operating income 10,708 5,116
Nonoperating income (expense):    
Interest income 431 435
Interest expense (87) (76)
Other income (expense), net (180) (146)
Income before income taxes 10,872 5,329
Income tax expense 4,194 1,961
Net income 6,678 3,368
Depreciation and amortization 3,876 4,651
Commerical
    
Segment Reporting Information    
Net sales 38,356 32,703
Contribution margin 6,202 4,538
Nonoperating income (expense):    
Depreciation and amortization 1,280 1,681
Live Events
    
Segment Reporting Information    
Net sales 44,509 38,517
Contribution margin 7,076 3,408
Nonoperating income (expense):    
Depreciation and amortization 1,104 1,311
Schools & Theatres
    
Segment Reporting Information    
Net sales 18,174 18,483
Contribution margin 2,577 3,400
Nonoperating income (expense):    
Depreciation and amortization 576 639
Transportation
    
Segment Reporting Information    
Net sales 16,596 11,500
Contribution margin 5,979 3,345
Nonoperating income (expense):    
Depreciation and amortization 324 361
International
    
Segment Reporting Information    
Net sales 15,284 17,495
Contribution margin 1,476 2,607
Nonoperating income (expense):    
Depreciation and amortization 137 164
Unallocated
    
Nonoperating income (expense):    
Depreciation and amortization $ 455 $ 495