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Note 11 - Long Term Debt (Details Textual) - USD ($) $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 22, 2020 | Apr. 18, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2021 | Jan. 31, 2018
Long-term Debt, Gross |  |  | $ 49,400 |  |  |
Debt Issuance Costs, Net, Total |  |  | 1,393 | $ 1,180 |  |
Repayments of Long-term Debt, Total |  |  | 66,912 | 11,703 |  |
Payment for Debt Extinguishment or Debt Prepayment Cost |  |  | 599 | (0) |  |
Write off of Deferred Debt Issuance Cost |  |  | 787 | 0 |  |
Interest Rate Swap [Member] | PNC Bank [Member] |  |  |  |  |  |
Payment for Debt Extinguishment or Debt Prepayment Cost |  |  | 500 |  |  |
Derivative Asset, Notional Amount |  |  |  |  |  | $ 36,000
Derivative Asset, Notional Amount Of Instrument Cancelled |  |  | $ 23,000 |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap [Member] |  |  |  |  |  |
Derivative, Fixed Interest Rate |  |  |  |  |  | 2.72%
Term Loan [Member] |  |  |  |  |  |
Line of Credit Facility, Interest Rate at Period End |  |  | 3.25% |  |  |
The Credit Agreement [Member] |  |  |  |  |  |
Debt Issuance Costs, Net, Total | $ 1,300 |  |  |  |  |
The Credit Agreement [Member] | Forecast [Member] |  |  |  |  |  |
Debt Instrument, Quarterly Payment, Current Year |  |  |  |  | $ 500 |
Debt Instrument Quarterly Payment Next Eight Years |  |  |  |  | 750 |
Debt Instrument, Quarterly Payment, Thereafter |  |  |  |  | $ 1,000 |
Percentage of Consolidated Excess Cash Flow |  |  |  |  | 50.00% |
The Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |
Debt Instrument, Interest Rate, State Floor Percentage |  |  | 0.50% |  |  |
The Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 3.25% |  |  |
The Credit Agreement [Member] | Base Rate [Member] |  |  |  |  |  |
Debt Instrument, Interest Rate, State Floor Percentage |  |  | 1.00% |  |  |
The Credit Agreement [Member] | The ABR Loan [Member] | Minimum [Member] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 1.50% |  |  |
The Credit Agreement [Member] | The ABR Loan [Member] | Maximum [Member] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 3.00% |  |  |
The Credit Agreement [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  | $ 15,600 |  |  |
The Prior Credit Facility [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 25,000
Repayments of Long-term Debt, Total | 46,700 |  |  |  |  |
Payment for Debt Extinguishment or Debt Prepayment Cost | 600 |  |  |  |  |
Paycheck Protection Program CARES Act [Member] |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt, Total |  | $ 6,100 |  |  |  |
Term Loan [Member] |  |  |  |  |  |
Long-term Debt, Gross |  |  | $ 40,000 | $ 54,997 |  |
Term Loan [Member] | The Prior Credit Facility [Member] |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  | $ 64,000
Term Loan [Member] | The Prior Credit Facility [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |
Write off of Deferred Debt Issuance Cost | 800 |  |  |  |  |
The LIBOR Loan and Pricing Grid Credit Agreement [Member] | The Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 2.00% |  |  |
The Lenders [Member] | The Credit Agreement [Member] | Letter of Credit [Member] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 10,000 |  |  |  |  |
The Lenders [Member] | The Credit Agreement [Member] | Swingline Loan Facility [Member] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 10,000 |  |  |  |  |
The Lenders [Member] | The Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  | 0.25% |  |  |
The Lenders [Member] | The Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  | 0.50% |  |  |
The Lenders [Member] | Term Loan [Member] | The Credit Agreement [Member] |  |  |  |  |  |
Long-term Debt, Gross | 40,000 |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 25,000 |  |  |  |  |

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