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Note 11 - Goodwill and Other Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets, Gross	$ 34,000	$ 34,000
Finite-Lived Intangible Assets, Accumulated Amortization	(2,193)	(1,462)
Finite-Lived Intangible Assets, Net	31,807	32,538
Trade Names [Member]
Finite-Lived Intangible Assets, Gross	4,400	4,400
Finite-Lived Intangible Assets, Accumulated Amortization	(220)	(147)
Finite-Lived Intangible Assets, Net	$ 4,180	$ 4,253
Finite-Lived Intangible Asset, Useful Life (Month)	15 years	180 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets, Gross	$ 1,400	$ 1,400
Finite-Lived Intangible Assets, Accumulated Amortization	(210)	(140)
Finite-Lived Intangible Assets, Net	$ 1,190	$ 1,260
Finite-Lived Intangible Asset, Useful Life (Month)	5 years	60 years
Customer Relationships [Member]
Finite-Lived Intangible Assets, Gross	$ 28,200	$ 28,200
Finite-Lived Intangible Assets, Accumulated Amortization	(1,763)	(1,175)
Finite-Lived Intangible Assets, Net	$ 26,437	$ 27,025
Finite-Lived Intangible Asset, Useful Life (Month)	12 years	144 years

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
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X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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X

- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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X

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Details

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