LONG-TERM DEBT (Details) (USD $)	0 Months Ended	3 Months Ended	0 Months Ended
	Dec. 19, 2012	Mar. 28, 2015	Jun. 28, 2013	Dec. 27, 2014 item	Sep. 27, 2014	Aug. 27, 2014	Apr. 29, 2013	Aug. 09, 2013
Credit Agreement | Wells Fargo
Long-term debt.
Maximum borrowing capacity	$ 45,000,000
Term of credit agreement	5 years
Unused credit capacity under the agreement		25,800,000
Effective interest rate (as a percent)		2.86%			2.50%
Number of financial covenants to be complied with		3		3
Flat cash dividend limit of capital stock issued and outstanding (per share)						$ 0.03
Credit Agreement | Wells Fargo | Prime rate
Long-term debt.
Variable interest rate basis		prime rate
Credit Agreement | Wells Fargo | LIBOR
Long-term debt.
Variable interest rate basis		LIBOR
Revolving credit facility | Wells Fargo
Long-term debt.
Maximum borrowing capacity		35,000,000
Checks outstanding in excess of bank balances		5,800,000
Outstanding amount		3,400,000		0
Amount of line of credit facility converted to term debt							10,000,000
Revolving credit facility | Wells Fargo | Prime rate
Long-term debt.
Variable interest rate basis		prime rate
Revolving credit facility | Wells Fargo | LIBOR
Long-term debt.
Variable interest rate basis		LIBOR
Revolving credit facility | Wells Fargo | Alternate base rate
Long-term debt.
Variable interest rate basis		federal funds rate plus 0.50%
Revolving credit facility | Wells Fargo | Federal funds rate
Long-term debt.
Variable interest rate basis		federal funds rate
Basis spread on variable interest rate basis (as a percent)		0.50%
Revolving credit facility | Wells Fargo | Minimum
Long-term debt.
Quarterly commitment fee (as a percent)		0.20%
Revolving credit facility | Wells Fargo | Minimum | LIBOR
Long-term debt.
Basis spread on variable interest rate basis (as a percent)		1.50%
Revolving credit facility | Wells Fargo | Minimum | Alternate base rate
Long-term debt.
Basis spread on variable interest rate basis (as a percent)		0.50%
Revolving credit facility | Wells Fargo | Maximum
Long-term debt.
Quarterly commitment fee (as a percent)		0.50%
Revolving credit facility | Wells Fargo | Maximum | LIBOR
Long-term debt.
Basis spread on variable interest rate basis (as a percent)		2.50%
Revolving credit facility | Wells Fargo | Maximum | Alternate base rate
Long-term debt.
Basis spread on variable interest rate basis (as a percent)		1.50%
Term Loan Facility | Interest rate swap | Cash flow
Long-term debt.
Notional amount								5,000,000
Fixed interest rate (as a percent)								3.10%
Term Loan Facility | Wells Fargo
Long-term debt.
Maximum borrowing capacity	10,000,000
Principal amount of debt							10,000,000
Principal amount payable in quarterly installments			166,667
Outstanding amount		8,800,000		9,000,000
Term Loan Facility | Wells Fargo | Prime rate
Long-term debt.
Variable interest rate basis		prime rate
Term Loan Facility | Wells Fargo | LIBOR
Long-term debt.
Variable interest rate basis		LIBOR
Letter Of Credit
Long-term debt.
Aggregate outstanding amount				3,300,000