Note 9 - Post Employment Benefit Obligations - Components of Net Periodic Pension Cost (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 01, 2019	May 26, 2018	Jun. 01, 2019	May 26, 2018
Service cost	$ 47,000	$ 49,000	$ 94,000	$ 98,000
Interest cost	110,000	105,000	221,000	210,000
Amortization of prior service costs	31,000	31,000	63,000	62,000
Amortization of transition obligation	0	11,000	0	22,000
Amortization of loss	46,000	65,000	92,000	130,000
Net periodic pension cost	$ 234,000	$ 261,000	$ 470,000	$ 522,000