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, 2014	Aug. 31, 2013
Segment Reporting Information [Line Items]
Net sales in percentage	100.00%	100.00%
NET SALES
Net sales	$ 57,429	$ 48,994
Operating Loss
Total operating loss	(3,703)	(1,404)
Interest expense	(94)	0
Interest income	24	25
Loss before income taxes	(3,773)	(1,379)
Recreational Vehicles [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	17.00%	26.00%
NET SALES
Net sales	9,689	12,560
Operating Loss
Total operating loss	(2,844)	(490)
Housing [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	83.00%	74.00%
NET SALES
Net sales	47,740	36,434
Operating Loss
Total operating loss	(396)	(580)
Housing [Member] | Manufactured Housing [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	71.00%	61.00%
NET SALES
Net sales	41,041	30,111
Housing [Member] | Modular Housing [Member]
Segment Reporting Information [Line Items]
Net sales in percentage	12.00%	13.00%
NET SALES
Net sales	6,699	6,323
General Corporate Expense [Member]
Operating Loss
Total operating loss	$ (463)	$ (334)