Note 1 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three months ended March 31,
	2020		2019
Product sales	$	1,359	$	-
Royalty income		4,789		4,161
License and other revenue		100		120
Total revenue	$	6,248	$	4,281

Property, Plant and Equipment [Table Text Block]

	March 31,			December 31,
	2020			2019
Machinery and equipment	$	6,809		$	5,204
Leasehold improvements		3,621			3,204
Computer equipment		710			691
Furniture and fixtures		908			908
Construction in progress		6,884			5,475
Property and equipment, gross		18,932			15,482
Less - accumulated depreciation		(4,259	)		(3,794	)
Property and equipment, net	$	14,673		$	11,688