FAIR VALUE MEASUREMENTS OF FINANCIAL INSTRUMENTS (Details)	12 Months Ended
	Sep. 28, 2019 USD ($) item	Dec. 31, 2016 USD ($)
Derivative [Line Items]
Number of variable rate debt instruments | item	3
Derivative, Number of Instruments Held | item	3
$1.405M Term Loan Swap [Member]
Derivative [Line Items]
Fixed interest rate	4.35%
Derivative, Notional Amount	$ 1,405,000
Variable interest rate, description	LIBOR - 1 Month, plus 2.25%
Variable interest rate, floating	4.296%
Term of swap	20 years
Line of Credit Swap [Member]
Derivative [Line Items]
Line of credit		$ 5,500,000
Fixed interest rate	4.61%
Derivative, Notional Amount	$ 5,500,000
Variable interest rate, description	LIBOR - 1 Month, plus 2.25%
Variable interest rate, floating	4.39%
Term of swap	5 years
$4.5M Mortgage Loan Swap [Member]
Derivative [Line Items]
Fixed interest rate	4.51%
Derivative, Notional Amount	$ 3,750,000
Variable interest rate, description	LIBOR - 1 Month, plus 2.25%
Variable interest rate, floating	4.339%
Term of swap	8 years