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Note 14 - Long Term Debt (Details Textual) - USD ($) $ in Thousands |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Jan. 22, 2018
Long-term Debt, Gross |  | $ 54,997 |  |  |
Term Loan [Member] |  |  |  |  |
Line of Credit Facility, Interest Rate at Period End |  | 8.48% |  |  |
Term Loan [Member] |  |  |  |  |
Long-term Debt, Gross |  | $ 54,997 | $ 62,400 |  |
Credit Agreement With Brown Brothers Harriman &Co [Member] |  |  |  |  |
Long-term Debt, Gross |  |  |  |  | $ 11,900
Senior Secured Credit Facility [Member] |  |  |  |  |
Debt Instrument, Term | 2023 years |  |  |  |
Debt Instrument, Quarterly Payment, Current Year |  |  |  | $ 400 |
Debt Instrument Quarterly Payment Next Year |  |  |  | 600 |
Debt Instrument, Quarterly Payment, Thereafter |  |  |  | $ 800 |
Percentage of Consolidated Excess Cash Flow |  |  |  | 50.00% |
Excess Cash Flow Payment, Tranche Two |  | 4,000 |  |  |
Excess Cash Flow Payment, Tranche One |  | $ 1,000 |  |  |
Limitation On Pledges of Capital Stock of Foreign Subsidiaries |  | 65.00% |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 8,700 |  |  |
Senior Secured Credit Facility [Member] | Base Rate [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 4.75% |  |  |
Senior Secured Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 6.25% |  |  |
Senior Secured Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 1.25% |  |  |
Senior Secured Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.25% |  |  |
Senior Secured Credit Facility [Member] | Revolving Credit Facility [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 25,000 |  |  |  |
Proceeds from Lines of Credit, Total | 4,800 |  |  |  |
Senior Secured Credit Facility [Member] | Term Loan [Member] |  |  |  |  |
Long-term Debt, Gross | $ 64,000 |  |  |  |

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