REVOLVING BANK LOAN (Details)		12 Months Ended
	Mar. 24, 2016 USD ($)	Dec. 31, 2016 USD ($)	Jan. 02, 2016 USD ($)
REVOLVING BANK LOAN AND LONG-TERM DEBT
Minimum tangible net worth threshold, percentage of the consolidated net income	50.00%
Maximum balance sheet leverage ratio	1.00
Period over which existing cash balance, anticipated cash flow from operations and borrowings available under the credit agreement will be sufficient to cover expected cash needs		12 months
Invested and capitalized		$ 2,884,000
Period Ending July042015 [Member]
REVOLVING BANK LOAN AND LONG-TERM DEBT
Minimum tangible net worth threshold, base amount	$ 31,000,000
Minimum [Member] | Period Ending June 28, 2014 [Member]
REVOLVING BANK LOAN AND LONG-TERM DEBT
Fixed charge coverage ratio	1.15
Revolving Credit Facility [Member]
REVOLVING BANK LOAN AND LONG-TERM DEBT
Maximum revolving credit facility line	$ 20,000,000
Borrowings as a percentage of capital expenditures	80.00%
Annual capital expenditures for fiscal year 2016, maximum	$ 5,500,000
Annual capital expenditures for fiscal year 2017, maximum	$ 5,500,000
Outstanding amount		2,000,000	$ 6,200,000
Highest balance outstanding during the period		7,500,000	7,400,000
Average outstanding		3,712,000	$ 5,205,000
Outstanding amount of letters of credit total		$ 5,415,000
Revolving Credit Facility [Member] | Minimum [Member]
REVOLVING BANK LOAN AND LONG-TERM DEBT
Borrowings as a percentage of eligible accounts receivable	80.00%
Borrowings as a percentage of eligible inventories	50.00%
Maximum inventory borrowings	$ 8,500,000
Revolving Credit Facility [Member] | Debt Instrument Variable Rate Base London Inter Bank offered Rate [Member]
REVOLVING BANK LOAN AND LONG-TERM DEBT
Variable interest rate base	LIBOR
Percentage points added to the reference rate	2.50%
Revolving Credit Facility [Member] | Debt Instrument Variable Rate Base Prime [Member]
REVOLVING BANK LOAN AND LONG-TERM DEBT
Variable interest rate base	prime rate
Percentage points added to the reference rate	0.25%