Note 6 - Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Intangible assets, impairment expense	$ (61,014,000)	$ (11,200,000)
Intangible assets, foreign currency translation adjustment	13,000
Intangible assets, gross, beginning balance	195,972,000
Intangible assets, gross, ending balance	134,971,000	195,972,000
Intangible assets, accumulated amortization, beginning balance	(48,111,000)
Intangible assets, amortization expense	(10,789,000)	(14,500,000)	$ (10,900,000)
Intangible assets, accumulated amortization, foreign currency translation adjustment	(14,000)
Intangible assets, accumulated amortization, ending balance	(58,914,000)	(48,111,000)
Intangible assets, net, beginning balance	147,861,000
Intangible assets, foreign currency translation adjustment, net	(1,000)
Intangible assets, net, ending balance	76,057,000	147,861,000
Customer Relationships [Member]
Finite-lived intangible assets, gross, beginning balance	122,814,000
Intangible assets, impairment expense	(41,990,000)
Intangible assets, foreign currency translation adjustment	2,000
Finite-lived intangible assets, gross, ending balance	$ 80,826,000	122,814,000
Customer Relationships [Member] | Minimum [Member]
Finite-lived Intangible Asset, Useful Life (Year)	8 years
Customer Relationships [Member] | Maximum [Member]
Finite-lived Intangible Asset, Useful Life (Year)	15 years
Trade Names [Member]
Finite-lived intangible assets, gross, beginning balance	$ 42,580,000
Intangible assets, impairment expense	(12,588,000)
Intangible assets, foreign currency translation adjustment	2,000
Finite-lived intangible assets, gross, ending balance	$ 29,994,000	42,580,000
Trade Names [Member] | Minimum [Member]
Finite-lived Intangible Asset, Useful Life (Year)	10 years
Trade Names [Member] | Maximum [Member]
Finite-lived Intangible Asset, Useful Life (Year)	15 years
Developed Technology Rights [Member]
Finite-lived intangible assets, gross, beginning balance	$ 19,897,000
Intangible assets, foreign currency translation adjustment	9,000
Finite-lived intangible assets, gross, ending balance	21,516,000	19,897,000
Intangible assets, finite-lived transfers	$ 1,610,000
Developed Technology Rights [Member] | Minimum [Member]
Finite-lived Intangible Asset, Useful Life (Year)	5 years
Developed Technology Rights [Member] | Maximum [Member]
Finite-lived Intangible Asset, Useful Life (Year)	15 years
Noncompete Agreements [Member]
Finite-lived intangible assets, gross, beginning balance	$ 2,710,000
Intangible assets, impairment expense	(110,000)
Finite-lived intangible assets, gross, ending balance	$ 2,600,000	2,710,000
Noncompete Agreements [Member] | Minimum [Member]
Finite-lived Intangible Asset, Useful Life (Year)	4 years
Noncompete Agreements [Member] | Maximum [Member]
Finite-lived Intangible Asset, Useful Life (Year)	5 years
Patents [Member]
Finite-lived Intangible Asset, Useful Life (Year)	10 years
Finite-lived intangible assets, gross, beginning balance	$ 373,000
Intangible assets, impairment expense	(338,000)
Finite-lived intangible assets, gross, ending balance	35,000	$ 373,000
IPR&D [Member]
Intangible assets, impairment expense	(5,988,000)
Indefinite-lived intangible assets, gross, beginning balance	7,598,000
Intangible assets, indefinite-lived transfers	$ (1,610,000)