SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (c) (e) (Details) - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Allowance for doubtful accounts
Movement in valuation and qualifying accounts and reserves
Balance at Beginning of Period	$ 240,000	$ 220,000
Additions Charged to Costs and Expenses	165,000	134,000
Deductions - Describe	(155,000)	114,000
Balance at End of Period	560,000	240,000
Inventory valuation reserve
Movement in valuation and qualifying accounts and reserves
Balance at Beginning of Period	518,000	312,000
Additions Charged to Costs and Expenses	1,544,000	282,000
Deductions - Describe	315,000	76,000
Balance at End of Period	1,747,000	518,000
Reserve for self-insured losses
Movement in valuation and qualifying accounts and reserves
Balance at Beginning of Period	1,881,000	1,861,000
Additions Charged to Costs and Expenses	5,483,000	5,034,000
Deductions - Describe	4,913,000	5,014,000
Balance at End of Period	$ 2,451,000	$ 1,881,000