Commitments and Contingencies - Additional Information (Detail) (USD $)	9 Months Ended			9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Feb. 28, 2014 Home	Feb. 28, 2013	May 31, 2013	Feb. 28, 2014 Minimum [Member]	May 31, 2013 Minimum [Member]	Feb. 28, 2014 Maximum [Member]	May 31, 2013 Maximum [Member]
Loss Contingencies [Line Items]
Period to potentially repurchase units				12 months	12 months	24 months	24 months
Maximum potential repurchase liability	$ 66,000,000		$ 71,000,000
Other accrued liabilities	100,000		100,000
Obligations from repurchased units	0	0
Net losses from repurchased units	0	0
Certificate of deposit pledged	$ 600,000
Number of homes to be manufactured and sold	60