Updates to Critical Accounting Policies and Estimates - Additional Information (Detail) - Segments [Domain] $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Nov. 30, 2013 USD ($)	May. 30, 2015 USD ($) Vote $ / shares shares	May. 31, 2014 USD ($) $ / shares shares	Jun. 01, 2013 USD ($) $ / shares shares	May. 28, 2011 USD ($)
Update Of Summary Of Significant Accounting Policies [Line Items]
Warranty Period Minimum		1 year
Business Acquisition, Transaction Costs					$ 238,800
Impairment of goodwill	$ 1,671	$ 0	$ 1,671	$ 0
Common Stock, Shares Authorized | shares		17,000,000
Allowance for Doubtful Accounts Receivable, Current		$ 283	581
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax		200	100	800
Finished Goods Included in inventories		33,700	30,900
Raw material and Work in progress included in inventories		5,100		3,000
Inventory Write-down		3,000	3,100
Inventory Valuation Reserves		200	800	400
Investments		34,700	32,700
Investments - current		23,692	31,732
Other Long-term Investments		10,900	1,000
Available-for-sale Securities, Equity Securities, Noncurrent		600	500
Proceeds from Sale of Available-for-sale Securities, Equity		200	0	200
Depreciation		1,700	1,000	1,000
Goodwill		0	0	1,519
Other non-current liabilities		1,221	1,315
Share-based Compensation		$ 726	$ 759	$ 619
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 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | shares		47,000	32,000	31,000
Proceeds from Stock Options Exercised		$ 300
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 200	$ 200	$ 100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares		$ 3.71	$ 4.53	$ 4.75
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 2,100
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		5 years		10 years 1 month
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value		$ 700
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares		880,589	489,064	280,764
Warranty Term Maximum		3 years
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	$ 0	$ 0
Available-for-sale Equity Securities, Gross Unrealized Loss		$ 100	$ 100	$ 100
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 | shares		187,000
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 | shares		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 | shares		65,000
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 | shares		400,000
Common Stock
Update Of Summary Of Significant Accounting Policies [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | shares		47,000	32,000	31,000
Class B Common Stock
Update Of Summary Of Significant Accounting Policies [Line Items]
Common Stock, Shares Authorized | shares		3,000,000
Number Of Votes For Class B Common Stock | Vote		10
Cash Dividends Class Common Stock Percentage		90.00%