Note 14 - License, Collaboration and Distribution Agreements (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Contract with Customer, Asset and Liability [Table Text Block]

	Balance at Beginning of the Period		Additions		Deductions			Balance at the end of the Period
	(in thousands)
Contract liabilities: deferred revenue	$	41	$	-	$	(41	)	$	-
Contract liabilities: accrued liabilities		1,432		5,708		(6,706	)		434
Total	$	1,473	$	5,708	$	(6,747	)	$	434

Disaggregation of Revenue [Table Text Block]

	Year Ended December 31,
	2019		2018
Revenue recognized in the period from:
Amounts included in contract liabilities at the beginning of the year:
Performance obligations satisfied	$	1,473	$	1,453
New activities during the year:
Performance obligations satisfied		5,126		11,055
	$	6,599	$	12,508

Schedule of Revenue Recognized [Table Text Block]

	Year Ended
	December 31,
(in thousands)	2019		2018		2017
Amortization of upfront technology and access fees	$	41	$	34	$	103
Product revenue		209		169		1,956
Total revenue recognized	$	250	$	203	$	2,059