Note 3 - Goodwill and Acquired Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Intangible Assets and Goodwill [Table Text Block]

						Other
						Intangible
	Goodwill		IPR&D			Assets
Balance at January 1, 2017	$	13,074	$	28,700		$	1,881
Amortization expense		-		-			(212	)
Balance at December 31, 2017		13,074		28,700			1,669
Reclassification		-		(4,900	)		4,900
Amortization expense		-		-			(503	)
Impairment		-		(23,200	)		-
Balance at December 31, 2018	$	13,074	$	600		$	6,066

Components of Finite Lived Intangible Assets [Table Text Block]

	Gross Amount		Accumulated Amortization		Net Carrying Value
Intangible assets - AZEDRA product rights	$	4,900	$	291	$	4,609
Intangible assets - EXINI technology		2,120		663		1,457
Total	$	7,020	$	954	$	6,066