Intangible Assets Subject to Amortization and Amortization Expense (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Jun. 01, 2013
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	$ 1,029	$ 1,023
Finite Lived Intangible Assets Accumulated Amortization	138	115
D and C Import-Export Inc. | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	29	29
Finite Lived Intangible Assets Accumulated Amortization	10	8
D and C Import-Export Inc. | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	633	633
Finite Lived Intangible Assets Accumulated Amortization	33	24
D and C Import-Export Inc. | Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	47	47
Finite Lived Intangible Assets Accumulated Amortization	8	6
Powerlink Specialist Electronics Support Limited | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	320	314
Finite Lived Intangible Assets Accumulated Amortization	$ 87	$ 77