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Industry Segment Information - Percentage Allocation of Manufactured Housing and Recreational Vehicle Net Sales (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Aug. 31, 2013
Aug. 31, 2012
Segment Reporting Information [Line Items]    
Net sales in percentage 100.00% 100.00%
Net sales    
Net sales $ 48,994 $ 49,920
Operating Loss    
Total operating loss (1,404) (3,471)
Interest income 25 3
Loss before income taxes (1,379) (3,468)
Housing [Member]
   
Segment Reporting Information [Line Items]    
Net sales in percentage 74.00% 62.00%
Net sales    
Net sales 36,434 30,912
Operating Loss    
Total operating loss (580) (1,637)
Housing [Member] | Modular Housing [Member]
   
Segment Reporting Information [Line Items]    
Net sales in percentage 13.00% 16.00%
Net sales    
Net sales 6,323 7,779
Housing [Member] | Domestic [Member] | Manufactured Housing [Member]
   
Segment Reporting Information [Line Items]    
Net sales in percentage 61.00% 46.00%
Net sales    
Net sales 30,111 23,133
Housing [Member] | Domestic [Member] | Modular Housing [Member]
   
Segment Reporting Information [Line Items]    
Net sales in percentage 10.00% 12.00%
Net sales    
Net sales 4,892 6,037
Housing [Member] | Canadian [Member] | Modular Housing [Member]
   
Segment Reporting Information [Line Items]    
Net sales in percentage 3.00% 4.00%
Net sales    
Net sales 1,431 1,742
Recreational Vehicles [Member]
   
Segment Reporting Information [Line Items]    
Net sales in percentage 26.00% 38.00%
Net sales    
Net sales 12,560 19,008
Operating Loss    
Total operating loss (490) (1,324)
Recreational Vehicles [Member] | Domestic [Member]
   
Segment Reporting Information [Line Items]    
Net sales in percentage 23.00% 32.00%
Net sales    
Net sales 11,127 15,933
Recreational Vehicles [Member] | Canadian [Member]
   
Segment Reporting Information [Line Items]    
Net sales in percentage 3.00% 6.00%
Net sales    
Net sales 1,433 3,075
General Corporate Expense [Member]
   
Operating Loss    
Total operating loss $ (334) $ (510)