Note 5 - Accounts Receivable

12 Months Ended

Dec. 31, 2019

Notes to Financial Statements

Loans, Notes, Trade and Other Receivables Disclosure [Text Block]

5

. Accounts Receivable

Our accounts receivable represent amounts due to us primarily from royalties, collaborators, milestone payments and AZEDRA product sales, and consisted of the following at

December 31, 2019

and

2018

(in thousands):

	2019		2018
Royalties	$	4,304	$	3,151
Product sales, license and other		11,672		652
Accounts receivable, net	$	15,976	$	3,803