SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2016 USD ($)	Jun. 26, 2015 USD ($)	Jul. 01, 2016 USD ($) Segment	Jun. 26, 2015 USD ($)	Dec. 31, 2015 USD ($)
Consolidation Policy [Abstract]
Percentage of voting interest			50.00%
Fiscal Year [Abstract]
Number of shipping days	64 days	63 days	129 days	123 days
Inventories [Abstract]
Percentage of LIFO inventory	58.00%		58.00%		67.00%
FIFO inventory amount	$ 3,600		$ 3,600		$ 3,600
Raw materials	9,760		9,760		11,262
Finished goods	9,863		9,863		12,380
Inventory reserves	(687)		(687)		(738)
LIFO reserve	(3,623)		(3,623)		(3,637)
Total inventories	15,313		15,313		19,267
Accumulated Other Comprehensive Loss [Abstract]
Foreign currency translation adjustments	1,000		1,000		1,000
Pension and other postretirement benefits adjustments	700		$ 700		700
Segment Reporting [Abstract]
Number of segments | Segment			1
Reclassifications [Abstract]
Other assets	30,520		$ 30,520		31,001
Current maturities of long-term debt	2,263		2,263		1,143
Long-term debt	20,934		20,934		21,435
Amortization of debt issuance costs			$ 74	$ 114
Minimum [Member]
Assumptions for expected term, volatility and risk-free rate [Abstract]
Expected term			2 months 12 days	1 year 2 months 12 days
Volatility			181.20%	149.80%
Risk-free interest rate			0.20%	0.40%
Maximum [Member]
Assumptions for expected term, volatility and risk-free rate [Abstract]
Expected term			5 years	5 years
Volatility			305.34%	323.00%
Risk-free interest rate			1.00%	1.70%
Selling, General and Administrative Expenses [Member]
Stock appreciation right income [Abstract]
Stock appreciation right (income) expense	$ (8)	$ 43	$ 24	$ 63
ASU 2015-03 [Member]
Reclassifications [Abstract]
Other assets					1,747
Current maturities of long-term debt					1,143
Long-term debt					21,435
Amortization of debt issuance costs				114
Accrued expenses		421		421
ASU 2015-03 [Member] | As Presented [Member]
Reclassifications [Abstract]
Other assets					3,882
Current maturities of long-term debt					1,800
Long-term debt					22,913
Amortization of debt issuance costs				278
Accrued expenses		257		257
ASU 2015-03 [Member] | Reclassifications [Member]
Reclassifications [Abstract]
Other assets					(2,135)
Current maturities of long-term debt					(657)
Long-term debt					$ (1,478)
Amortization of debt issuance costs				(164)
Accrued expenses		$ 164		$ 164