Note 15 - Significant Customers (Details) - Summary of Major Customers	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Distributor A [Member] | Sales Revenue, Goods, Net [Member]
Revenue, Major Customer [Line Items]
Distributor	26.00%		32.00%	32.00%
Distributor A [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Distributor	31.00%		32.00%
Distributor B [Member] | Sales Revenue, Goods, Net [Member]
Revenue, Major Customer [Line Items]
Distributor		[1]	10.00%		[1]
Distributor B [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Distributor	10.00%		17.00%

[1] Represents less than 10%.