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Note 15 - Subsequent Event (Details Textual) - USD ($) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 23, 2018 | Apr. 22, 2018 | Mar. 31, 2018 | Dec. 31, 2017
Debt Issuance Costs, Net, Total |  |  | $ 18,615 | $ 19,585
Secured Debt [Member] | Incremental Term Loan B [Member] | Subsequent Event [Member] |  |  |  |
Debt Issuance Costs, Net, Total | $ 2,000 |  |  |
Secured Debt [Member] | Incremental Term Loan B [Member] | London Interbank Offered Rate (LIBOR) [Member] | Subsequent Event [Member] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.75% | 2.25% |  |
Secured Debt [Member] | Incremental Term Loan B [Member] | Base Rate [Member] | Subsequent Event [Member] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.75% | 1.25% |  |

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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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