Note 6 - Fair Value (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	December 31, 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)	$	6,329	$	-	$	-	$	6,329
Restricted cash		1,141		-		-		1,141
Short-term investments		-		64,195		-		64,195
Long-term investments		-		3,865		-		3,865
Total assets measured at fair value	$	7,470	$	68,060	$	-	$	75,530
Liabilities measured at fair value
Contingent consideration	$	-	$	-	$	1,256	$	1,256
Total liabilities measured at fair value	$	-	$	-	$	1,256	$	1,256

	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	December 31, 2022	December 31, 2021
Contingent consideration	Probability weighted income approach	Milestone dates	2032	2031
		Discount rate	16.5%	9.5%
		Revenue volatility	45.0%	39.0%
		EUR-to-USD exchange rate	1.07	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)
	Contingent consideration
Balance at December 31, 2020	$	3,936
Change in fair value		(1,565	)
Balance at December 31, 2021	$	2,371
Change in fair value		(1,115	)
Balance at December 31, 2022	$	1,256
Current portion	$	-
Long-term portion		1,256
Balance at December 31, 2022	$	1,256