Note 6 - Segment Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Note 6 - Segment Information (Details) [Line Items]
Number of Reportable Segments			1
Customer A [Member]
Note 6 - Segment Information (Details) [Line Items]
Concentration Risk, Percentage	31.00%	30.00%	32.00%	30.00%
Customer A1 [Member]
Note 6 - Segment Information (Details) [Line Items]
Concentration Risk, Percentage		16.00%		15.00%
Customer A2 [Member]
Note 6 - Segment Information (Details) [Line Items]
Concentration Risk, Percentage		13.00%		14.00%
Customer A3 [Member]
Note 6 - Segment Information (Details) [Line Items]
Concentration Risk, Percentage		1.00%		1.00%
Maximum [Member] | Sales Revenue, Goods, Net [Member]
Note 6 - Segment Information (Details) [Line Items]
Concentration Risk, Percentage			10.00%