Note 1 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three months ended September 30,				Nine months ended September 30,
	2019		2018		2019		2018
Product sales	$	570	$	-	$	840	$	-
Royalty income		4,912		5,169		12,666		11,757
License and other revenue		131		148		6,354		627
Total revenue	$	5,613	$	5,317	$	19,860	$	12,384

Property, Plant and Equipment [Table Text Block]

	September 30,			December 31,
	2019			2018
Machinery and equipment	$	4,030		$	2,992
Leasehold improvements		3,052			1,734
Computer equipment		655			721
Furniture and fixtures		908			878
Construction in progress		4,079			317
Property and equipment, gross		12,724			6,642
Less - accumulated depreciation		(3,470	)		(2,698	)
Property and equipment, net	$	9,254		$	3,944