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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

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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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

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