Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 29, 2018	Dec. 30, 2017
Current Assets
Accounts receivable, allowances	$ 680,000	$ 470,000
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)	8,965,987	8,957,974
Common Stock, shares outstanding (in shares)	6,231,258	6,263,245
Treasury Stock, shares (in shares)	2,734,729	2,694,729