Note 6 - Goodwill, In-Process Research and Development, and Other Intangible Assets - Goodwill, In-Process Research and Development, and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Balance, Goodwill	$ 13,074	$ 13,074
Balance, IPR&D	28,700	28,700
Balance, Finite-lived Intangible Assets	1,881	2,093
Amortization expense, Finite-lived Intangible Assets	(53)	(53)
Balance, Goodwill	13,074	13,074
Balance, IPR&D	28,700	28,700
Balance, Finite-lived Intangible Assets	$ 1,828	$ 2,040