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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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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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