Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Topic 835
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-Section 45
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
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- Definition

Amount of increase (decrease) of the credit facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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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 long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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Borrowings (Details Textual) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
Borrowings (Details Textual) - USD ($)	Jan. 21, 2016	Mar. 23, 2013	Dec. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment			$ 313,000
Short-term Debt, Weighted Average Interest Rate			3.19%	2.56%
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months			$ 1,300,000
Long-term Debt, Maturities, Repayments of Principal in Year Two			19,400,000
Long-term Debt, Maturities, Repayments of Principal in Year Three			1,200,000
Long-term Debt, Maturities, Repayments of Principal in Year Four			1,200,000
Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 5,000,000
Debt Instrument, Interest Rate, Stated Percentage			3.188%
Term Loan [Member] \| Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jan. 21, 2021
Seller Financed Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Nov. 30, 2016
Debt Instrument, Periodic Payment		$ 156,000
Senior Revolving Credit Facility [Member] \| Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Increase (Decrease), Net, Total	$ 7,500,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 35,000,000
Debt Instrument, Maturity Date	Jan. 21, 2019
Debt Instrument, Interest Rate, Stated Percentage			3.227%