Note K - Shareholders' Equity (Details Textual) shares in Thousands	Dec. 30, 2016 shares
Common Stock [Member]
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	315

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

No definition available.

Name:	us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant