Note 3 - Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

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

As of December 31, 2018	Level 1		Level 2		Level 3		Total
Assets:
Money market accounts	$	30,657	$	—	$	—	$	30,657
Liabilities:
Warrant liability (restated)	$	—	$	—	$	28,516	$	28,516

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

	Year ended December 31,
(In thousands)	2019
Beginning balance	$	—
Purchases		1,000
Change in fair value recognized in net income		—
Total	$	1,000

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

	Year ended December 31,
(In thousands)	2019
Beginning balance	$	—
Additions		2,347
Change in fair value recognized in net income		50
Payments earned, reclassified to accrued liabilities		(483	)
Total	$	1,914

Warrant Liabilities [Member]

Notes Tables

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

(In thousands)	Year ended December 31, 2019			Year ended December 31, 2018 (restated)
Beginning balance (as restated)	$	28,516		$	19,623
Exercised warrants		(1,749	)		(19,378	)
Change in fair value recognized in net income		12,835			28,271
Ending balance	$	39,602		$	28,516