Note 8 - Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Gross carrying amount	$ 219,622	$ 221,095
Accumulated amortization	(114,795)	(101,399)
Net carrying amount	$ 104,828	119,696
Licensing Agreements [Member]
Weighted average useful lives (Year)	8 months 12 days
Gross carrying amount	$ 3,894	3,894
Accumulated amortization	(3,825)	(3,716)
Net carrying amount	$ 70	178
Lease Agreements [Member]
Weighted average useful lives (Year)	1 year
Gross carrying amount	$ 864	864
Accumulated amortization	(777)	(689)
Net carrying amount	$ 87	175
Trademarks [Member]
Weighted average useful lives (Year)	8 years 3 months 18 days
Gross carrying amount	$ 15,699	15,751
Accumulated amortization	(6,911)	(6,202)
Net carrying amount	$ 8,788	9,549
Noncompete Agreements [Member]
Weighted average useful lives (Year)	3 years 3 months 18 days
Gross carrying amount	$ 2,301	2,529
Accumulated amortization	(1,354)	(1,229)
Net carrying amount	$ 947	1,300
Customer Relationships [Member]
Weighted average useful lives (Year)	7 years 2 months 12 days
Gross carrying amount	$ 157,576	159,719
Accumulated amortization	(76,832)	(66,753)
Net carrying amount	$ 80,744	92,966
Patents [Member]
Weighted average useful lives (Year)	9 years
Gross carrying amount	$ 39,288	38,338
Accumulated amortization	(25,097)	(22,810)
Net carrying amount	$ 14,192	$ 15,528