Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

Year ended December 31, (in thousands)
	201 8			2017
Current	$	284		$	28
Deferred		(280	)		--
Total	$	4		$	28

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

Year ended December 31,	201 8			2017
Statutory rate		21	%		35	%
Change in valuation allowance		(21	%)		(29	%)
Effective rate		--	%		6	%

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

(in thousands)	2018			2017
Deferred tax assets:
Federal, state and foreign loss carryforwards	$	--		$	794
Deferred revenue		23			11
Federal and state tax credits		294			757
Other		438			402
Total deferred tax asset		755			1,964
Less valuation allowance		(475	)		(1,964	)
Net deferred tax asset	$	280		$	--