Note 4 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

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

Origin of income before taxes	2020			2019
United States	$	(3,411	)	$	(5,803	)
Foreign		(810	)		(2,034	)
Loss before income taxes	$	(4,221	)	$	(7,837	)

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

	2020			2019
Current:
Federal	$	—		$	—
State		(7	)		(14	)
Foreign		(88	)		—
Total current		(95	)		(14	)
Deferred:
Federal		22			—
State		16			—
Total deferred		38			—
Income tax expense	$	(57	)	$	(14	)

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

	2020			2019
Provision at the U.S. federal statutory rate		21.0	%		21.0	%
State taxes, net of federal benefit		1.5	%		2.7	%
Foreign tax rate differential		0.5	%		—	%
China Enterprise Tax		(2.1	)%		—	%
Valuation allowance		(13.9	)%		(29.2	)%
Share based compensation shortfall		(2.0	)%		—	%
Other true up		(2.7	)%		1.6	%
Intangible assets impairment and other non-deductibles		1.8	%		2.3	%
State rate change		(6.5	)%		—	%
Other		1.0	%		1.8	%
Income tax (expense) benefit effective rate		(1.4	)%		0.2	%

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

	2020			2019
Deferred tax assets:
Stock compensation expense	$	1,240		$	1,882
Goodwill		986			1,490
Royalty accruals		560			560
Bad debt allowance		338			466
Net operating loss carryforwards		10,959			9,146
Credit carry-forwards		841			814
Inventory reserve		206			243
Depreciation		499			502
Other		334			340
Total deferred tax assets		15,963			15,443
Deferred tax liabilities:
Intangible assets		(126	)		(220	)
Total deferred tax liabilities		(126	)		(220	)
Net deferred tax asset before valuation allowance		15,837			15,223
Valuation allowances for deferred tax assets		(15,971	)		(15,394	)
Net deferred tax liability	$	(134	)	$	(171	)

Summary of Valuation Allowance [Table Text Block]

Year	Balance at January 1		Charged to costs and expenses		(Deductions)/Other		Balance at December 31
2019	$	13,044		2,350		—	$	15,394
2020	$	15,394		577			$	15,971