Note 7 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]

	Derivatives at Fair Value as of March 31, 2020
(in thousands)	Level 1		Level 2		Level 3		Total
Warrant derivative liabilities	$	-	$	-	$	2,547	$	2,547
Total warrant derivative liabilities	$	-	$	-	$	2,547	$	2,547

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Level 3 Liabilities
(in thousands)	Warrant Derivative Liabilities
Balance at December 31, 2019	$	-
Reclassification of warrant liability		1,986
Unrealized loss on warrants		561
Balance at March 31, 2020	$	2,547