Note 15 - Concentration of Risk (Details) - Customer Concentration (Customer Concentration Risk [Member])	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Customer A [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Customer		[1]	11.00%
Customer A [Member] | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Customer		[1]	14.00%
Customer B [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Customer	17.00%		21.00%
Customer B [Member] | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Customer	15.00%		18.00%
Customer C [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Customer	17.00%			[1]
Customer C [Member] | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Customer		[1]		[1]

[1] Customer's balances were below the 10% threshold for accounts receivable or net sales for 2014 or 2013, as applicable.