Note E - Revenue and Contract Liabilities - Schedule Of Contract Liabilities From Contract With Customers (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 03, 2021	Jan. 02, 2021
Contract liabilities at beginning of period	$ 15,952	$ 13,852
Increase due to deferral of revenue at period end	16,017	15,952
Decrease due to beginning contract liabilities recognized as revenue	(15,198)	(13,852)
Contract liabilities at end of period	$ 16,771	$ 15,952