Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the required periodic payments applied to principal.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fixed interest rate related to the interest rate derivative.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Section S99
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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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No definition available.

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The effective interest rate at the end of the reporting period.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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DEBT (Details) - USD ($)			6 Months Ended
DEBT (Details) - USD ($)	Jun. 28, 2013	Dec. 19, 2012	Jul. 01, 2017	Dec. 31, 2016	Aug. 09, 2013
Amended And Restated Credit Agreement \| Wells Fargo
Debt.
Maximum borrowing capacity		$ 45,000,000
Term of credit agreement		5 years
Unused credit capacity under the agreement			$ 35,000,000
Amended And Restated Credit Agreement \| Wells Fargo \| Prime Rate [Member]
Debt.
Effective interest rate (as a percent)			3.06%	3.05%
Variable interest rate basis			prime rate
Amended And Restated Credit Agreement \| Wells Fargo \| London Interbank Offered Rate L I B O R [Member]
Debt.
Variable interest rate basis			LIBOR
Revolving Credit Facility \| Wells Fargo
Debt.
Maximum borrowing capacity			$ 35,000,000
Borrowings outstanding under credit facility			$ 0	$ 0
Revolving Credit Facility \| Wells Fargo \| Prime Rate [Member]
Debt.
Variable interest rate basis			prime rate
Revolving Credit Facility \| Wells Fargo \| London Interbank Offered Rate L I B O R [Member]
Debt.
Variable interest rate basis			LIBOR
Revolving Credit Facility \| Wells Fargo \| Debt Instrument Variable Rate Federal Funds Rate [Member]
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
Debt.
Quarterly commitment fee (as a percent)			0.20%
Revolving Credit Facility \| Wells Fargo \| Minimum \| London Interbank Offered Rate L I B O R [Member]
Debt.
Basis spread on variable interest rate basis (as a percent)			1.50%
Revolving Credit Facility \| Wells Fargo \| Minimum \| Base Rate [Member]
Debt.
Basis spread on variable interest rate basis (as a percent)			0.50%
Revolving Credit Facility \| Wells Fargo \| Maximum
Debt.
Quarterly commitment fee (as a percent)			0.50%
Revolving Credit Facility \| Wells Fargo \| Maximum \| London Interbank Offered Rate L I B O R [Member]
Debt.
Basis spread on variable interest rate basis (as a percent)			2.50%
Revolving Credit Facility \| Wells Fargo \| Maximum \| Base Rate [Member]
Debt.
Basis spread on variable interest rate basis (as a percent)			1.50%
Secured Debt [Member] \| Interest Rate Swap \| Cash Flow Hedging
Debt.
Notional amount					$ 5,000,000
Fixed interest rate (as a percent)					3.10%
Secured Debt [Member] \| Wells Fargo
Debt.
Maximum borrowing capacity			$ 10,000,000
Principal amount payable in quarterly installments	$ 166,667
Term loan facility			$ 7,200,000	7,500,000
Secured Debt [Member] \| Wells Fargo \| Prime Rate [Member]
Debt.
Variable interest rate basis			prime rate
Secured Debt [Member] \| Wells Fargo \| London Interbank Offered Rate L I B O R [Member]
Debt.
Variable interest rate basis			LIBOR
Letter Of Credit
Debt.
Aggregate outstanding amount			$ 1,900,000	$ 1,900,000