Note 8 - Employee Post-employment Benefits (Details Textual)	3 Months Ended	7 Months Ended	12 Months Ended
	Dec. 03, 2013 USD ($)	Jun. 30, 2014	May 31, 2016 USD ($)	Jun. 02, 2015 USD ($)	Jun. 03, 2014 USD ($)
Management [Member]
Restructuring and Related Cost, Number of Positions Eliminated		82
Former Executives [Member] | Employee Severance [Member]
Payments for Postemployment Benefits				$ 300,000
Former Executives [Member]
Severance Costs				300,000
Former President and Executive Vice President [Member]
Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense, Forfeiture Credits			$ 1,600,000
Former Chief Operating Officer [Member]
Severance Costs					$ 900,000
Chief People Officer [Member]
Severance Costs	$ 400,000
Staff Personnel [Member]
Restructuring and Related Cost, Number of Positions Eliminated		82
Pension Benefits [Member]
Defined Benefit Plan, Future Amortization of Gain (Loss)			1,700,000
Deferred Compensation Plan [Member]
Prepaid Expense, Current			700,000	700,000
Other Assets, Noncurrent			6,000,000	7,300,000
Employee-related Liabilities			700,000	700,000
Other Liabilities, Noncurrent			6,000,000	7,300,000
Retirement Plan [Member]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year			200,000
Pension Plan [Member] | Cash and Cash Equivalents [Member]
Assets Held-in-trust			400,000
Pension Plan [Member]
Cash Surrender Value of Life Insurance			27,900,000	29,500,000
Postretirement Medical and Life Benefits [Member]
Defined Benefit Plan, Future Amortization of Gain (Loss)			1,700,000
Employee Severance [Member]
Employee-related Liabilities			317,000	313,000	1,055,000
Employee-related Liabilities, Current			$ 300,000	300,000
Minimum [Member] | Equity Securities [Member]
Defined Benefit Plan, Target Plan Asset Allocations			4171.00%
Minimum [Member] | Fixed Income Securities [Member]
Defined Benefit Plan, Target Plan Asset Allocations			1343.00%
Minimum [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan, Target Plan Asset Allocations			20.00%
Minimum [Member]
Primary Investment Objectives, Focus on Time Horizon			10 years
Equity Securities [Member]
Defined Benefit Plan, Target Plan Asset Allocations			56.00%
Fixed Income Securities [Member]
Defined Benefit Plan, Target Plan Asset Allocations			28.00%
Defined Contribution Plan, Cost Recognized			$ 300,000	0	0
Prepaid Expense, Current			11,508,000	12,398,000
Other Assets, Noncurrent			45,751,000	54,398,000
Employee-related Liabilities, Current			$ 14,561,000	20,351,000
Defined Benefit Pension Plans			3
Defined Benefit Plan, Target Allocation, Percentage of Assets, Alternative Investments			16.00%
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year			$ 2,500,000
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year			7.60%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate			5.00%
Defined Benefit Plan Health Care Cost Trend Rate Assumed for Next Fiscal Year, Impact on Net Periodic Postretirement Benefit Expense, Percent			1.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match			25.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay			4.00%
Deferred Compensation, Net			$ 6,700,000	8,000,000
Other Liabilities, Noncurrent			67,093,000	66,261,000
Investment in RTI Common Stock and Related Liability Payable in RTI Common Stock			500,000	700,000
Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense, Forfeiture Credits			1,600,000
Severance Costs			$ 1,006,000	$ 1,211,000	$ 4,300,000