Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	December 31
	201 9			201 8
Net operating loss carryforwards	$	18,771		$	20,720
Net operating loss carryforwards of foreign subsidiaries		374			374
Depreciation expense		(77	)		4
Stock-based compensation expense		36			28
Other		68			78
Net deferred tax assets		19,172			21,204
Valuation allowance for net deferred tax assets		(19,172	)		(21,204	)
Net deferred tax assets, net of allowance	$	—		$	—

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

	201 9			201 8
Reconciliation of income tax benefit to statutory rate:
Income benefit at statutory rate	$	938		$	480
State income taxes (benefit), net of federal income tax benefit		1,066			57
Permanent differences		10			(91	)
Change in valuation allowance		(2,030	)		(450	)
Other		16			4
	$	—		$	—