Note 2 - Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

As of March 31, 2021	Level 1		Level 2		Level 3		Total
Assets:
Money market accounts	$	89,012	$	-	$	-	$	89,012
Total		89,012		-		-		89,012
Liabilities:
Contingent consideration - business combinations		-		-		6,661		6,661
Total	$	-	$	-	$	6,661	$	6,661

As of December 31, 2020	Level 1		Level 2		Level 3		Total
Assets:
Money market accounts	$	90,403	$	-	$	-	$	90,403
Total		90,403		-		-		90,403
Liabilities:
Contingent consideration - business combinations		-		-		7,152		7,152
Warrant liability		-		-		2,780		2,780
Total	$	-	$	-	$	9,932	$	9,932

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

	March 31,			December 31,
(In thousands)	2021			2020
Beginning balance	$	7,152		$	1,914
Additions		-			3,663
Change in fair value recognized in net income		(491	)		1,575
Total	$	6,661		$	7,152

Warrant Liabilities [Member]

Notes Tables

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

	March 31,			December 31,
(In thousands)	2021			2020
Beginning balance	$	2,780		$	39,602
Exercised warrants		(2,901	)		(33,221	)
Change in fair value recognized in net income		121			(3,601	)
Total	$	-		$	2,780