Note 1 - Business and Summary of Significant Accounting Policies - Estimated Useful Lives of Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Customer Relationships [Member]
Intangible assets, estimated useful life (Year)	12 years 292 days	11 years 109 days
Customer Relationships [Member] | Minimum [Member]
Intangible assets, estimated useful life (Year)	7 years
Customer Relationships [Member] | Maximum [Member]
Intangible assets, estimated useful life (Year)	15 years
Restrictive Covenant [Member]
Intangible assets, estimated useful life (Year)	255 days	1 year 109 days
Restrictive Covenant [Member] | Minimum [Member]
Intangible assets, estimated useful life (Year)	1 year
Restrictive Covenant [Member] | Maximum [Member]
Intangible assets, estimated useful life (Year)	3 years
Trade Names [Member]
Intangible assets, estimated useful life (Year)	255 days	1 year
Trade Names [Member] | Minimum [Member]
Intangible assets, estimated useful life (Year)	1 year 182 days
Trade Names [Member] | Maximum [Member]
Intangible assets, estimated useful life (Year)	7 years
Intellectual Property [Member]
Intangible assets, estimated useful life (Year)	4 years 36 days	5 years 73 days
Intellectual Property [Member] | Minimum [Member]
Intangible assets, estimated useful life (Year)	4 years
Intellectual Property [Member] | Maximum [Member]
Intangible assets, estimated useful life (Year)	6 years