Note N - Commitments and Contingencies - Non-cancelable Operating Lease Commitments (Details) $ in Thousands	Mar. 25, 2018 USD ($)
2019, Lease commitments	$ 1,654
2019, Sublease income	330
2019, Net lease commitments	1,324
2020, Lease commitments	1,569
2020, Sublease income	332
2020, Net lease commitments	1,237
2021, Lease commitments	1,089
2021, Sublease income	309
2021, Net lease commitments	780
2022, Lease commitments	1,092
2022, Sublease income	263
2022, Net lease commitments	829
2023, Lease commitments	1,103
2023, Sublease income	175
2023, Net lease commitments	928
Thereafter, Lease commitments	4,892
Thereafter, Sublease income	690
Thereafter, Net lease commitments	4,202
Lease commitments	11,399
Sublease income	2,099
Net lease commitments	$ 9,300