CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($)	Jun. 29, 2019	Dec. 29, 2018
Current Assets
Accounts receivable, allowances	$ 476,000	$ 680,000
Shareholders' Equity
Preferred Stock, par value (in dollars per share)	$ 0	$ 0
Preferred Stock, shares authorized (in shares)	2,000,000	2,000,000
Common Stock, par value (in dollars per share)	$ 0	$ 0
Common Stock, shares authorized (in shares)	50,000,000	50,000,000
Common Stock, shares issued (in shares)	8,970,509	8,965,987
Treasury Stock, shares (in shares)	2,734,729	2,634,729