Note L - Stockholders' Equity, Stock Plans and Other Employee Benefit Plans - Transactions With Respect to Restricted Stock (Details) - Restricted Stock [Member]	12 Months Ended
	Mar. 28, 2021 $ / shares shares
Unvested restricted stock, Shares (in shares) | shares	667
Unvested restricted stock, weighted average grant date fair value per share (in dollars per share) | $ / shares	$ 89.90
Granted, Shares (in shares) | shares	0
Granted, weighted average grant date fair value per share (in dollars per share) | $ / shares	$ 0
Vested, Shares (in shares) | shares	334
Vested, weighted average grant date fair value per share (in dollars per share) | $ / shares	$ 89.90
Unvested restricted stock, Shares (in shares) | shares	333
Unvested restricted stock, weighted average grant date fair value per share (in dollars per share) | $ / shares	$ 89.90