Revenue, Major Customer [Line Items]

$ 20,187,000

$ 19,657,000

Customer concentration risk percentage description

During fiscal 2015, net sales of homes and park models to Sun Home Services, Inc. totaled approximately $20,187,000 or 11 percent of total net sales. During fiscal 2014, net sales to this customer totaled $19,657,000 or 13 percent of total net sales. No other individual customer in fiscal 2015 and 2014 had net sales greater than 10 percent of net total sales.

Customer Concentration - Additional Information (Detail) - USD ($)	3 Months Ended								12 Months Ended
	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May. 31, 2014	Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2013	May. 31, 2015	May. 31, 2014
Revenue, Major Customer [Line Items]
Net sales	$ 49,605,000	$ 38,109,000	$ 49,667,000	$ 49,604,000	$ 46,040,000	$ 30,169,000	$ 39,208,000	$ 37,663,000	$ 186,985,000	$ 153,080,000
Sun Home Services, Inc [Member]
Revenue, Major Customer [Line Items]
Net sales									$ 20,187,000	$ 19,657,000
Net sale Percentage									11.00%	13.00%
Customer concentration risk percentage description									During fiscal 2015, net sales of homes and park models to Sun Home Services, Inc. totaled approximately $20,187,000 or 11 percent of total net sales. During fiscal 2014, net sales to this customer totaled $19,657,000 or 13 percent of total net sales. No other individual customer in fiscal 2015 and 2014 had net sales greater than 10 percent of net total sales.