Updates to Critical Accounting Policies and Estimates - Additional Information (Detail) (USD $)	12 Months Ended
	May 31, 2014	Jun. 01, 2013	Jun. 02, 2012
Update Of Summary Of Significant Accounting Policies [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	489,064	280,764	272,864
Impairment of goodwill	$ 1,671,000	$ 0	$ 0
Allowance for Doubtful Accounts Receivable, Current	581,000	1,092,000
Finished Goods Included in inventories	30,900,000	31,600,000
Raw material and Work in progress included in inventories	3,000,000	2,400,000
Inventory Valuation Reserves	800,000	400,000	400,000
Investments	32,700,000	44,000,000
Investments - current	31,732,000	38,971,000
Other Long-term Investments	1,000,000	5,000,000
Available-for-sale Securities, Equity Securities, Noncurrent	500,000	400,000
Proceeds from Sale of Available-for-sale Securities, Equity	200,000	200,000	200,000
Depreciation	1,000,000	1,000,000	1,100,000
Goodwill	0	1,519,000	1,261,000
Other non-current liabilities	1,315,000	1,287,000
Share-based Compensation	759,000	619,000	481,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 4 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	32,000	31,000	121,000
Proceeds from Stock Options Exercised	200,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	200,000	100,000	600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 4.53	$ 4.75	$ 5.38
Document Period End Date	May 31, 2014
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	100,000	800,000	(100,000)
Preferred Stock, Shares Authorized	5,000,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	2,100,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	800,000
Maximum [Member]
Update Of Summary Of Significant Accounting Policies [Line Items]
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments	100,000	100,000
Available-for-sale Equity Securities, Gross Unrealized Loss	$ 100,000	$ 100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	10 years
Two Thousand Eleven Stock Incentive Compensation Plan [Member]
Update Of Summary Of Significant Accounting Policies [Line Items]
Deferred Compensation Arrangement with Individual, Common Stock Reserved for Future Issuance	359,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Two Thousand Eleven Stock Incentive Compensation Plan [Member] | Maximum [Member]
Update Of Summary Of Significant Accounting Policies [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	750,000
Stock Option Plan Twenty Zero Six [Member]
Update Of Summary Of Significant Accounting Policies [Line Items]
Deferred Compensation Arrangement with Individual, Common Stock Reserved for Future Issuance	70,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years 1 month
Stock Option Plan Twenty Zero Six [Member] | Maximum [Member]
Update Of Summary Of Significant Accounting Policies [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	400,000
Common Stock
Update Of Summary Of Significant Accounting Policies [Line Items]
Common Stock, Shares Authorized	30,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	32,000	31,000	121,000
Class B Common Stock
Update Of Summary Of Significant Accounting Policies [Line Items]
Common Stock, Shares Authorized	10,000,000
Number Of Votes For Class B Common Stock	10
Cash Dividends Class Common Stock Percentage	90.00%