Industry Segment Information (Details) (USD $)	3 Months Ended	9 Months Ended
Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Net sales
Net Sales in Percentage	100.00%	100.00%	100.00%	100.00%
Net sales	$ 36,986,000	$ 36,805,000	$ 128,742,000	$ 132,385,000
Operating Loss
Gain on sale of idle property, plant and equipment			1,411,000	2,500,000
Total operating loss	(5,390,000)	(7,390,000)	(10,595,000)	(17,668,000)
Interest income	25,000	3,000	37,000	14,000
Loss before income taxes	(5,365,000)	(7,387,000)	(10,558,000)	(17,654,000)
Housing [Member]
Net sales
Net Sales in Percentage	60.00%	52.00%	63.00%	61.00%
Net sales	22,114,000	19,065,000	81,571,000	80,368,000
Operating Loss
Total operating loss	(3,132,000)	(4,694,000)	(6,502,000)	(12,500,000)
Housing [Member] \| Modular Housing [Member]
Net sales
Net Sales in Percentage	10.00%	10.00%	14.00%	12.00%
Net sales	3,476,000	3,835,000	18,512,000	16,345,000
Housing [Member] \| Domestic [Member] \| Manufactured Housing [Member]
Net sales
Net Sales in Percentage	50.00%	42.00%	49.00%	49.00%
Net sales	18,638,000	15,230,000	63,059,000	64,023,000
Housing [Member] \| Domestic [Member] \| Modular Housing [Member]
Net sales
Net Sales in Percentage	8.00%	8.00%	11.00%	9.00%
Net sales	2,840,000	3,047,000	14,632,000	11,801,000
Housing [Member] \| Canadian [Member] \| Modular Housing [Member]
Net sales
Net Sales in Percentage	2.00%	2.00%	3.00%	3.00%
Net sales	636,000	788,000	3,880,000	4,544,000
Recreational Vehicles [Member]
Net sales
Net Sales in Percentage	40.00%	48.00%	37.00%	39.00%
Net sales	14,872,000	17,740,000	47,171,000	52,017,000
Operating Loss
Total operating loss	(1,721,000)	(2,009,000)	(3,974,000)	(5,749,000)
Recreational Vehicles [Member] \| Domestic [Member]
Net sales
Net Sales in Percentage	30.00%	31.00%	29.00%	30.00%
Net sales	11,124,000	11,615,000	37,517,000	39,214,000
Recreational Vehicles [Member] \| Canadian [Member]
Net sales
Net Sales in Percentage	10.00%	17.00%	8.00%	9.00%
Net sales	3,748,000	6,125,000	9,654,000	12,803,000
General Corporate Expense [Member]
Operating Loss
Total operating loss	$ (537,000)	$ (687,000)	$ (1,530,000)	$ (1,919,000)

Sales revenue net percentage.

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- Definition

The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

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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

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

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- Definition

Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 14

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

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