Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 28, 2019	Dec. 29, 2018
Current Assets
Accounts receivable, allowances	$ 556,000	$ 680,000
Shareholders' Equity
Voting Preferred Stock, par value (in dollars per share)	$ 0	$ 0
Voting Preferred Stock, shares authorized (in shares)	1,000,000	1,000,000
Nonvoting Preferred Stock, par value (in dollars per share)	$ 0	$ 0
Nonvoting Preferred Stock, shares authorized (in shares)	1,000,000	1,000,000
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)	8,975,434	8,965,987
Common Stock, shares outstanding (in shares)	6,240,705	6,231,258
Treasury Stock, shares (in shares)	2,734,729	2,734,729