Industry Segment Information - Percentage Allocation of Manufactured Housing and Recreational Vehicle Net Sales (Detail) (USD $)	3 Months Ended	6 Months Ended
Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012
Segment Reporting Information [Line Items]
Net sales in percentage	100.00%	100.00%	100.00%	100.00%
Net sales
Net sales	$ 46,263,000	$ 41,836,000	$ 95,257,000	$ 91,756,000
Operating Loss
Gain on sale of idle property, plant and equipment	162,000	1,411,000	162,000	1,411,000
Total operating loss	(2,238,000)	(1,734,000)	(3,642,000)	(5,205,000)
Interest income	25,000	9,000	50,000	12,000
Loss before income taxes	(2,213,000)	(1,725,000)	(3,592,000)	(5,193,000)
Housing [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	82.00%	68.00%	78.00%	65.00%
Net sales
Net sales	38,160,000	28,545,000	74,594,000	59,457,000
Operating Loss
Total operating loss	(510,000)	(1,733,000)	(1,090,000)	(3,370,000)
Housing [Member] \| Modular Housing [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	14.00%	17.00%	13.00%	17.00%
Net sales
Net sales	6,772,000	7,257,000	13,095,000	15,036,000
Housing [Member] \| Domestic [Member] \| Manufactured Housing [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	68.00%	51.00%	65.00%	48.00%
Net sales
Net sales	31,388,000	21,288,000	61,499,000	44,421,000
Housing [Member] \| Domestic [Member] \| Modular Housing [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	10.00%	14.00%	10.00%	13.00%
Net sales
Net sales	4,822,000	5,755,000	9,714,000	11,792,000
Housing [Member] \| Canadian [Member] \| Modular Housing [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	4.00%	3.00%	3.00%	4.00%
Net sales
Net sales	1,950,000	1,502,000	3,381,000	3,244,000
Recreational Vehicles [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	18.00%	32.00%	22.00%	35.00%
Net sales
Net sales	8,103,000	13,291,000	20,663,000	32,299,000
Operating Loss
Total operating loss	(1,497,000)	(929,000)	(1,987,000)	(2,253,000)
Recreational Vehicles [Member] \| Domestic [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	16.00%	25.00%	19.00%	29.00%
Net sales
Net sales	7,415,000	10,460,000	18,542,000	26,393,000
Recreational Vehicles [Member] \| Canadian [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	2.00%	7.00%	3.00%	6.00%
Net sales
Net sales	688,000	2,831,000	2,121,000	5,906,000
General Corporate Expense [Member]
Operating Loss
Total operating loss	$ (393,000)	$ (483,000)	$ (727,000)	$ (993,000)

Sales revenue net percentage.

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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(1)(i))

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- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.7(b))

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The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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-Publisher SEC

-Name Regulation S-X (SX)

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