Note 2 - Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

As of December 31, 2021	Level 1		Level 2		Level 3		Total
Assets:
Money market accounts	$	63,873	$	-	$	-	$	63,873
Total		63,873		-		-		63,873
Liabilities:
Contingent consideration - business combinations		-		-		10,027		10,027
Total	$	-	$	-	$	10,027	$	10,027

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

Warrant Liabilities [Member]

Notes Tables

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

	Year Ended December 31,
(In thousands)	2021			2020			2019
Beginning balance	$	2,780		$	39,602			28,516
Exercised warrants		(2,901	)		(33,221	)		(1,749	)
Change in fair value recognized in net (loss) income		121			(3,601	)		12,835
Ending balance	$	-		$	2,780		$	39,602

Contingent Consideration Liabilities [Member]

Notes Tables

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

	Year Ended December 31,
(In thousands)	2021		2020		2019
Beginning balance	$	7,152	$	1,914		-
Additions		-		3,663		2,347
Change in fair value recognized in net (loss) income		2,875		1,575		50
Payments earned, reclassified to accrued liabilities		-		-		(483	)
Ending balance	$	10,027	$	7,152	$	1,914