Note 5 - Accounting Policies and Recent Accounting Pronouncements (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2020

Dec. 31, 2019

Notes Tables

Schedule of Indefinite-Lived Intangible Assets [Table Text Block]

(in thousands)	Carrying Value
Istaroxime drug candidate	$	22,340
Rostafuroxin drug candidate		54,750
Total	$	77,090

(in thousands)	Carrying Value
Istaroxime drug candidate	$	22,340
Rostafuroxin drug candidate		54,750
Total	$	77,090