Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

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

Year ended December 31,
(in thousands)	2012		2011
Current	$	57	$	67
Provision for uncertain tax positions		23		26
Total	$	80	$	93

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

Year ended December 31,	2012				2011
Statutory rate		35		%		35		%
Change in valuation allowance		(35	)	%		(35	)	%
Other – state		(58	)	%		12		%
Effective rate		(58	)	%		12		%

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

(in thousands)	2012			2011
Deferred tax assets:
Federal, state and foreign loss carryforwards	$	6,852		$	6,893
Capitalized research and development		753			1,312
Deferred revenue		(76	)		(153	)
Federal and state tax credits		1,773			2,135
Other		346			219
Total deferred tax asset		9,648			10,405
Less valuation allowance		(9,648	)		(10,405	)
Net deferred tax asset	$	--		$	--

Summary of Operating Loss Carryforwards [Table Text Block]

(in thousands)	2012		2011
2012	$	--	$	1,038
2019		2,901		2,901
2021		1,184		1,184
2022		1,083		1,083
2023		1,778		1,778
Thereafter		12,631		11,635
Total	$	19,577	$	19,619