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Industry Segment Information - Percentage Allocation of Manufactured Housing and Recreational Vehicle Net Sales (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 31, 2014 | Feb. 28, 2014 | Nov. 30, 2013 | Aug. 31, 2013 | May 31, 2013 | Feb. 28, 2013 | Nov. 30, 2012 | Aug. 31, 2012 | May 31, 2014 | May 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales in percentage |  |  |  |  |  |  |  |  | 100.00% | 100.00%
Net sales |  |  |  |  |  |  |  |  |  |
Net sales | $ 57,701,000 | $ 38,772,000 | $ 46,263,000 | $ 48,994,000 | $ 48,832,000 | $ 36,986,000 | $ 41,836,000 | $ 49,920,000 | $ 191,730,000 | $ 177,574,000
Operating Loss |  |  |  |  |  |  |  |  |  |
Gain on sale of idle property, plant and equipment |  |  |  |  |  |  |  |  | 706,000 | 1,641,000
Total operating loss |  |  |  |  |  |  |  |  | (11,893,000) | (10,577,000)
Interest expense |  |  |  |  |  |  |  |  | (71,000) |
Interest income |  |  |  |  |  |  |  |  | 100,000 | 64,000
Loss before income taxes |  |  |  |  |  |  |  |  | (11,864,000) | (10,513,000)
Housing [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales in percentage |  |  |  |  |  |  |  |  | 76.00% | 63.00%
Net sales |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 145,864,000 | 111,104,000
Operating Loss |  |  |  |  |  |  |  |  |  |
Total operating loss |  |  |  |  |  |  |  |  | (6,128,000) | (6,867,000)
Housing [Member] | Modular Housing [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales in percentage |  |  |  |  |  |  |  |  | 13.00% | 14.00%
Net sales |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 25,034,000 | 23,724,000
Housing [Member] | Domestic [Member] | Manufactured Housing [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales in percentage |  |  |  |  |  |  |  |  | 63.00% | 49.00%
Net sales |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 120,830,000 | 87,380,000
Housing [Member] | Domestic [Member] | Modular Housing [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales in percentage |  |  |  |  |  |  |  |  | 10.00% | 11.00%
Net sales |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 19,884,000 | 18,562,000
Housing [Member] | Canadian [Member] | Modular Housing [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales in percentage |  |  |  |  |  |  |  |  | 3.00% | 3.00%
Net sales |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 5,150,000 | 5,162,000
Recreational Vehicles [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales in percentage |  |  |  |  |  |  |  |  | 24.00% | 37.00%
Net sales |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 45,866,000 | 66,470,000
Operating Loss |  |  |  |  |  |  |  |  |  |
Total operating loss |  |  |  |  |  |  |  |  | (4,951,000) | (3,444,000)
Recreational Vehicles [Member] | Domestic [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales in percentage |  |  |  |  |  |  |  |  | 20.00% | 30.00%
Net sales |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 38,082,000 | 53,267,000
Recreational Vehicles [Member] | Canadian [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales in percentage |  |  |  |  |  |  |  |  | 4.00% | 7.00%
Net sales |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 7,784,000 | 13,203,000
General Corporate Expense [Member] |  |  |  |  |  |  |  |  |  |
Operating Loss |  |  |  |  |  |  |  |  |  |
Total operating loss |  |  |  |  |  |  |  |  | $ (1,520,000) | $ (1,907,000)

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