Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

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

Year ended December 31,
(in thousands)	2013		2012
Current	$	43	$	57
Provision for uncertain tax positions		26		23
Total	$	69	$	80

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

Year ended December 31,	2013			2012
Statutory rate		35	%		35	%
Change in valuation allowance		(35	%)		(35	%)
Other – state		13	%		(58	%)
Effective rate		13	%		(58	%)

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

(in thousands)	2013			2012
Deferred tax assets:
Federal, state and foreign loss carryforwards	$	6,527		$	6,852
Capitalized research and development		475			753
Deferred revenue		77			(76	)
Federal and state tax credits		1,762			1,773
Other		563			346
Total deferred tax asset		9,404			9,648
Less valuation allowance		(9,404	)		(9,648	)
Net deferred tax asset	$	--		$	--

Summary of Operating Loss Carryforwards [Table Text Block]

(in thousands)	2013		2012
2019	$	2,901	$	2,901
2021		1,184		1,184
2022		1,083		1,083
2023		1,302		1,778
Thereafter		12,177		12,631
Total	$	18,647	$	19,577