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Note 19 - Subsequent Events (Details Textual) - USD ($) $ in Thousands |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 22, 2019 | May 02, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | May 01, 2018
Repayments of Long-term Debt, Total |  |  | $ 127,439 | $ 77,573 | $ 106,827 |
Long-term Debt, Gross |  |  | 117,693 | $ 38,975 |  |
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months |  |  | 6,000 |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Two |  |  | 6,000 |  |  |
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 |  |  |
Long Term Debt Maturities Repayments of Principal in Year Six |  |  | $ 1,500 |  |  |
Long Term Debt Maturities Repayments of Principal in Year Seven |  |  |  |  |  | $ 3,050
Credit Agreement [Member] | Term Loan 2 [Member] |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 85,000 |  |  |  |
Credit Agreement [Member] | Term Loan 2 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.93% |  |  |  |
Credit Agreement [Member] | Term Loan 2 [Member] | Subsequent Event [Member] |  |  |  |  |  |
Debt Instrument, Face Amount | $ 85,000 |  |  |  |  |
Repayments of Long-term Debt, Total | 20,000 |  |  |  |  |
Long-term Debt, Gross | 65,000 |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months | 8,500 |  |  |  |  |
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 Six | 9,300 |  |  |  |  |
Long Term Debt Maturities Repayments of Principal in Year Seven | $ 9,300 |  |  |  |  |
Credit Agreement [Member] | Term Loan 2 [Member] | Subsequent Event [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.85% |  |  |  |  |

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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the seventh fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the sixth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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