Note 4 - Fair Value (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	June 30, 2022
	(in thousands)
Description	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets measured at fair value
Cash and cash equivalents (1)	$	10,844	$	-	$	-	$	10,844
Restricted cash		1,290		-		-		1,290
Short-term investments		-		83,360		-		83,360
Long-term investments		-		9,581		-		9,581
Total assets measured at fair value	$	12,134	$	92,941	$	-	$	105,075
Liabilities measured at fair value
Contingent consideration	$	-	$	-	$	1,619	$	1,619
Total liabilities measured at fair value	$	-	$	-	$	1,619	$	1,619

	December 31, 2021
	(in thousands)
Description	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets measured at fair value
Cash and cash equivalents (1)	$	18,129	$	-	$	-	$	18,129
Restricted cash		1,154		-		-		1,154
Short-term investments		-		80,262		-		80,262
Long-term investments		-		37,435		-		37,435
Total assets measured at fair value	$	19,283	$	117,697	$	-	$	136,980
Liabilities measured at fair value
Contingent consideration	$	-	$	-	$	2,371	$	2,371
Total liabilities measured at fair value	$	-	$	-	$	2,371	$	2,371

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	Valuation Methodology	Significant Unobservable Input	June 30, 2022			December 31, 2021
Contingent consideration	Probability weighted income approach	Milestone dates		2031			2031
		Discount rate		14.5	%		9.5	%
		Revenue volatility		40.0	%		39.0	%
		EUR-to-USD exchange rate		1.05			1.14

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

	Fair Value Measurement at Reporting Date (Level 3)
	(in thousands)
	Series B Warrants			Contingent consideration
Balance at December 31, 2021	$	-		$	2,371
Change in fair value		-			(752	)
Balance at June 30, 2022	$	-		$	1,619
Balance at December 31, 2020	$	255		$	3,936
Exercise of warrants		(2,236	)		-
Change in fair value		1,981			257
Balance at June 30, 2021	$	-		$	4,193
Current portion	$	-		$	-
Long-term portion		-			1,619
Balance at June 30, 2022	$	-		$	1,619