Note 12 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Amortization of Intangible Assets, Total	$ 29,000	$ 5,000
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	85,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	100,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	95,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	91,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	85,000
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	21,000
Goodwill, Impairment Loss	$ 0	$ 0