Note B - Adoption of New Accounting Standards - Impact of New Standard on Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 29, 2019	Apr. 01, 2019	Mar. 31, 2019
Operating lease assets	$ 7,520	$ 7,804
Other assets	460	496	465
Current portion of operating lease liabilities	1,009	1,162
Long-term operating lease liabilities	7,251	7,371
Other liabilities	$ 773	692	$ 1,390
Previous Accounting Guidance [Member]
Operating lease assets
Other assets		465
Current portion of operating lease liabilities
Long-term operating lease liabilities
Other liabilities		1,390
Adjustments for New Accounting Pronouncement [Member]
Operating lease assets		7,804
Other assets
Current portion of operating lease liabilities		1,162
Long-term operating lease liabilities		7,371
Other liabilities		(729)
Balance Sheet Reclassification Adjustments [Member]
Operating lease assets
Other assets		31
Current portion of operating lease liabilities
Long-term operating lease liabilities
Other liabilities		$ 31