Note 2 - Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

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

As of September 30, 2020	Level 1		Level 2		Level 3		Total
Assets:
Money market accounts	$	93,984	$	—	$	—	$	93,984
Restricted cash held in escrow		15,000		—		—		15,000
Convertible debt held at fair value		—		—		2,110		2,110
Total		108,984		—		2,110		111,094
Liabilities:
Contingent consideration - business combinations		—		—		386		386
Warrant liability		—		—		1,914		1,914
Total	$	—	$	—	$	2,300	$	2,300

As of December 31, 2019	Level 1		Level 2		Level 3		Total
Assets:
Money market accounts	$	6,448	$	—	$	—	$	6,448
Convertible debt held at fair value		—		—		1,000		1,000
Total		6,448		—		1,000		7,448
Liabilities:
Contingent consideration - business combinations		—		—		1,914		1,914
Warrant liability		—		—		39,602		39,602
Total	$	—	$	—	$	41,516	$	41,516

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
(In thousands)
Balance, beginning of period	$	1,000	$	—	$	1,000	$	—
Purchases		—		1,000		—		1,000
Change in fair value recognized in net income		1,110		—		1,110		—
Balance, end of period	$	2,110	$	1,000	$	2,110	$	1,000

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

	Three Months Ended September 30,					Nine Months Ended September 30,
	2020			2019		2020			2019
(In thousands)
Balance, beginning of period	$	388		$	1,492	$	1,914		$	—
Additions		—			—		—			1,492
Change in fair value recognized in net income		(2	)		—		(1,528	)		—
Payments earned, reclassified to accrued liabilities		—			—		—			—
Balance, end of period	$	386		$	1,492	$	386		$	1,492

Warrant Liabilities [Member]

Notes Tables

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2020			2019			2020			2019
(In thousands)
Balance, beginning of period	$	963		$	44,194		$	39,602		$	28,516
Exercised warrants		(54	)		(1,295	)		(33,221	)		(1,694	)
Change in fair value recognized in net income		1,005			(1,128	)		(4,467	)		14,949
Balance, end of period	$	1,914		$	41,771		$	1,914		$	41,771