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Debt (Narrative) (Details) - USD ($) |  | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 03, 2016 | Apr. 30, 2017 | Jul. 01, 2017 | Jun. 08, 2017 | Mar. 13, 2017 | Oct. 26, 2016
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Interest Rate at Period End |  | 4.50% |  |  |  |
Company restriction from issuing dividends or making payments with respect to the Company's Capital Stock to it's annual limit |  | $ 1,300,000 |  |  |  |
Provision to reduce borrowings under the line |  | $ 6,000,000 |  |  |  |
Provision to reduce borrowings under the line, period | 60 days | 30 days |  |  |  |
PNC [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Remaining borrowing capacity |  | $ 13,375,000 |  |  |  |
PNC [Member] | Revolving Credit Facility [Member] | Amendment No. 7 To The Credit Agreement [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 49,500,000 |  |  |  | $ 49,750,000
Line of Credit Facility, Capacity Available for Equipment Financing |  | $ 2,500,000 |  |  | $ 2,500,000 |
Eurodollar [Member] | Minimum [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Revolving credit facility bears interest range of |  | 1.50% |  |  |  |
Eurodollar [Member] | Maximum [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Revolving credit facility bears interest range of |  | 2.50% |  |  |  |
Alternate Base Rate Loans [Member] | London Interbank Offered Rate LIBOR [Member] | Minimum [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Revolving credit facility bears interest range of |  | 0.50% |  |  |  |
Alternate Base Rate Loans [Member] | London Interbank Offered Rate LIBOR [Member] | Maximum [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Revolving credit facility bears interest range of |  | 1.50% |  |  |  |
Subsequent Event [Member] | PNC [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Remaining borrowing capacity |  |  |  | $ 14,000,000 |  |
Subsequent Event [Member] | PNC [Member] | Revolving Credit Facility [Member] | Amendment No. 7 To The Credit Agreement [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Capacity Available for Equipment Financing |  |  |  | $ 2,500,000 |  |
Scenario, Forecast [Member] | PNC [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Remaining borrowing capacity |  |  | $ 11,000,000 |  |  |

X
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- Definition The effective interest rate at the end of the reporting period. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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