Note 9 - Income Taxes (Details) - Activity in Valuation Allowance on Deferred Tax Assets (Valuation Allowance of Deferred Tax Assets [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Valuation Allowance of Deferred Tax Assets [Member]
Valuation Allowance [Line Items]
Beginning balance January 1	$ 983	$ 299
Additional provisions to allowance	401	684
Write-offs and other deductions	(383)
Ending balance December 31	$ 1,001	$ 983