Gain on Sale of Property, Plant and Equipment - Additional Information (Detail)	3 Months Ended	12 Months Ended
May 31, 2015 USD ($) Facility	May 31, 2015 USD ($)
Property, Plant and Equipment [Line Items]
Gain on the sale of idle facilities		$ 243,000
Ocala, Florida [Member] \| Idle Housing Facility [Member]
Property, Plant and Equipment [Line Items]
Number of idle facilities sold \| Facility	1
Gain on the sale of idle facilities	$ 243,000

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

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)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Name:	us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration