Note 3 - Goodwill and Intangible Assets - Intangible Asset Summaries (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Carrying Value	$ 43,755	$ 43,755
Accumulated Amortization	(43,597)	(43,225)
Net Book Value	158	530
Customer Relationships [Member]
Carrying Value	24,025	24,025
Accumulated Amortization	(23,867)	(23,497)
Net Book Value	158	528
Customer Contracts [Member]
Carrying Value	19,600	19,600
Accumulated Amortization	(19,600)	(19,600)
Net Book Value
Noncompete Agreements [Member]
Carrying Value	107	107
Accumulated Amortization	(107)	(107)
Net Book Value
Trade Names [Member]
Carrying Value	23	23
Accumulated Amortization	(23)	(21)
Net Book Value		$ 2

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

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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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

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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