Note 7 - Segment and Geographic Information (Details) - Customers with Sales Greater than 10% (Customer Concentration Risk [Member])	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Customer A [Member] | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Major customer	26.00%	33.00%		26.00%	32.00%
Customer A [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Major customer				25.00%	32.00%
Customer B [Member] | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Major customer	10.00%		[1]	10.00%		[1]
Customer B [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Major customer				13.00%	17.00%

[1] Represents less than 10%.