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Note 8 - Indebtedness (Details Textual) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Feb. 01, 2018 | Dec. 02, 2013 | Dec. 31, 2018
Other Assets [Member] | Other Nonoperating Income (Expense) [Member] |  |  |
Derivative, Gain on Derivative |  |  | $ 64,000
Interest Rate Swap [Member] |  |  |
Derivative, Notional Amount | $ 20,000,000 |  | $ 17,142,856
Derivative, Term of Contract | 5 years |  |
Derivative, Fixed Interest Rate |  |  | 2.70%
Interest Rate Swap [Member] | Other Assets [Member] |  |  |
Derivative Asset, Total |  |  | $ 64,000
Revolving Credit Facility [Member] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 40,000,000 |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 1.00% |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 1.50% |
Revolving Credit Facility [Member] | Prime Rate [Member] | Minimum [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.00% |
Revolving Credit Facility [Member] | Prime Rate [Member] | Maximum [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.25% |
Amended and Restated Credit Agreement [Member] | Subsidiary Guarantors [Member] |  |  |
Debt Instrument, Face Amount | $ 70,000,000 |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  | 3.52%
Amended and Restated Credit Agreement [Member] | Subsidiary Guarantors [Member] | Unsecured Term Loan [Member] |  |  |
Debt Instrument, Face Amount | 20,000,000 |  |
Amended and Restated Credit Agreement [Member] | Subsidiary Guarantors [Member] | Unsecured Revolving Credit Facility [Member] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 50,000,000 |  |
Amended and Restated Credit Agreement [Member] | Subsidiary Guarantors [Member] | Standby Letters of Credit [Member] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 600,000 |  |
Amended and Restated Credit Agreement [Member] | Prime Rate [Member] | Maximum [Member] | Subsidiary Guarantors [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.25% |  |
Unsecured Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Subsidiary Guarantors [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.00% |  |
Unsecured Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Subsidiary Guarantors [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.50% |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References 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 + Details
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