Note 11 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	2020			2019
Current income taxes
Federal	$	—		$	—
State		—			—
Foreign		169			100
Deferred income taxes
Federal		—			—
State		—			—
Foreign		(1,685	)		(3,224	)
Total income tax expense (benefit)	$	(1,516	)	$	(3,124	)

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	2020			2019
United States	$	(34,398	)	$	(91,935	)
Foreign		(26,430	)		(65,390	)
Total loss from operations before taxes	$	(60,828	)	$	(157,325	)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2020			2019
Deferred tax assets:
Stock-based compensation	$	4,253		$	3,665
Accrued expenses and other		906			1,007
Research credit carryforward		7,209			6,776
Fixed assets		385			345
Capitalized start-up costs and other intangibles		2,686			3,618
Net operating loss carryforwards		122,193			113,410
		137,632			128,821
Valuation allowance		(132,928	)		(123,108	)
Net deferred tax asset		4,704			5,713
Deferred tax liabilities
Fixed assets and other		(1,590	)		(1,445	)
Purchase accounting intangibles		(2,807	)		(5,660	)
Net deferred tax liability		(4,397	)		(7,105	)
Net deferred tax asset (liability)	$	307		$	(1,392	)

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	2020		2019
Beginning balance	$	1,512	$	1,363
Gross increases for tax positions related to current periods		108		149
Gross increases for tax positions related to prior periods		—		—
Ending balance	$	1,620	$	1,512

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2020						2019
				Percent of Pretax						Percent of Pretax
	Amount			Earnings			Amount			Earnings
United States federal tax at statutory rate	$	(12,774	)		21.0	%	$	(33,038	)		21.0	%
State taxes (net of deferred benefit)		(1,768	)		2.9	%		(4,778	)		3.0	%
Nondeductible expenses		719			(1.2	%)		709			(0.5	%)
Change in fair market value of contingent consideration		717			(1.2	%)		(2,342	)		1.5	%
Warrant remeasurement and financing costs		82			(0.1	%)		(551	)		0.4	%
Research & Development credits		(542	)		0.9	%		(743	)		0.5	%
Change in unrecognized tax benefits		108			(0.2	%)		149			(0.1	%)
Foreign tax rate differential		1,589			(2.6	%)		2,590			(1.6	%)
Goodwill and investment impairments		—			(0	%)		(6,638	)		4.2	%
Change in enacted tax rates and other, net		533			(0.9	%)		(253	)		0.2	%
Change in valuation allowance		9,820			(16.1	%)		41,771			(26.6	%)
Income tax benefit	$	(1,516	)		2.5	%	$	(3,124	)		2.0	%