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Note 2 - Long-term Debt (Details Textual) $ in Thousands |  |  |  | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 22, 2019 USD ($) | May 02, 2018 USD ($) | Feb. 28, 2017 USD ($) | Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Mar. 01, 2019 USD ($) | Dec. 31, 2018 USD ($) | May 01, 2018 USD ($) | Mar. 01, 2018 USD ($) | Dec. 31, 2017 USD ($)
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year |  |  |  | $ 6,000 |  |  |  |  |  |
Long Term Debt Maturities Repayments of Principal in Year Six |  |  |  | 1,500 |  |  |  |  |  |
Repayments of Long-term Debt, Total |  |  |  | 55,161 | $ 24,642 |  |  |  |  |
Long-term Debt, Gross |  |  |  | 117,578 |  |  | $ 117,693 |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Two |  |  |  | 6,000 |  |  |  |  |  |
Derivative, Fixed Interest Rate |  |  |  |  |  |  |  |  | 3.12% |
Stockholders' Equity Attributable to Parent, Ending Balance |  |  |  | 151,725 | $ 139,066 |  | $ 150,921 |  |  | $ 124,968
Long-term Debt, Maturities, Repayments of Principal in Year Three |  |  |  | 6,000 |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Four |  |  |  | 6,000 |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Five |  |  |  | 6,000 |  |  |  |  |  |
Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  | 18,000 |  |  |  | $ 17,500 | $ 18,000 |
Derivative, Notional Amount, Monthly Reduction Amount |  |  |  |  |  |  |  |  | $ 300 |
Derivative, Swaption Interest Rate |  |  |  |  |  |  |  | 3.05% |  |
Interest Rate Swap [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent, Ending Balance |  |  |  |  |  | $ 100 |  |  |  |
Interest Rate Swap [Member] | Other Current Liabilities [Member] |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | $ 17,500 |  |  |  |  |  |  |  |
Derivative Liability, Total |  | 100 |  |  |  |  |  |  |  |
Credit Agreement [Member] | Term Loan 2 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | 85,000 |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year |  |  |  | 8,500 |  |  |  |  |  |
Long Term Debt Maturities Repayments of Principal in Year Six |  |  |  | $ 9,300 |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  | 3.34% |  |  |  |  |  |
Repayments of Long-term Debt, Total | $ 20,000 |  |  |  |  |  |  |  |  |
Long-term Debt, Gross | $ 65,000 |  |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Two |  |  |  | $ 9,300 |  |  |  |  |  |
Long Term Debt Maturities Repayments of Principal in Year Eight |  |  |  | 800 |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Three |  |  |  | 9,300 |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Four |  |  |  | 9,300 |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Five |  |  |  | 9,300 |  |  |  |  |  |
Long Term Debt Maturities Repayments of Principal in Year Seven |  |  |  | $ 9,300 |  |  |  |  |  |
Credit Agreement [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 42,000 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  | 3.17% |  |  |  |  |  |
Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Term Loan 2 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.85% |  |  |  |  |  |  |  |  |
Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.68% |  |  |  |  |  |  |  |
Amended and Restated Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |
Fixed Charge Coverage Ratio | 1.25 |  |  |  |  |  |  |  |  |
EBITA Ratio | 4 |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | Credit Agreement [Member] | Fifth Third Bank [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  | $ 35,000 |  |
Revolving Credit Facility [Member] | Credit Agreement [Member] | BB&T [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 75,000 |  |  |  |  |  |  |  |
Add on Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 0.75% |  |  |  |  |  |  |
Amended Credit Agreement [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 42,000 |  |  |  |  |  |  |
Amended Credit Agreement [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Expiration Period |  |  | 7 years |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 35,000 |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage |  |  | 0.10% |  |  |  |  |  |  |
Letters of Credit Outstanding, Amount |  |  |  | $ 0 |  |  |  |  |  |

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