Note N - Commitments and Contingencies - Non-cancelable Operating Lease Commitments (Details) $ in Thousands	Mar. 26, 2017 USD ($)
2018, Lease commitments	$ 1,645
2018, Sublease income	327
2018, Net lease commitments	1,318
2019, Lease commitments	1,654
2019, Sublease income	330
2019, Net lease commitments	1,324
2020, Lease commitments	1,545
2020, Sublease income	332
2020, Net lease commitments	1,213
2021, Lease commitments	1,063
2021, Sublease income	309
2021, Net lease commitments	754
2022, Lease commitments	1,065
2022, Sublease income	263
2022, Net lease commitments	802
Thereafter, Lease commitments	5,841
Thereafter, Sublease income	865
Thereafter, Net lease commitments	4,976
Lease commitments	12,813
Sublease income	2,426
Net lease commitments	$ 10,387