Note 4 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Intangible Assets and Goodwill [Table Text Block]

		March 31,		December 31,
(in thousands)	2021		2020
Rostafuroxin drug candidate	$	54,750	$	54,750
Istaroxime drug candidate		22,340		22,340
Intangible assets		77,090		77,090
Goodwill	$	15,682	$	15,682