Note 5 - Accounts Receivable (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

	June 30,		December 31,
	2019		2018
Royalties	$	3,593	$	3,151
Bayer milestone		2,000		-
FUJIFILM transfer		4,000		-
Other		976		652
Accounts receivable, net	$	10,569	$	3,803