Note 8 - Employee Post-employment Benefits - Benefits Expected to be Paid in Each of the Next Five Years and in the Aggregate for the Five Years Thereafter (Details)
$ in Thousands
Jun. 06, 2017
USD ($)
Pension Plan [Member]  
2018 $ 3,716
2019 2,274
2020 2,214
2021 5,212
2022 8,138
2023-2027 11,585
Postretirement Medical and Life Benefits [Member]  
2018 123
2019 109
2020 101
2021 103
2022 95
2023-2027 $ 356