Note 15 - Concentration of Risk (Detail) - Customers accounting for 10% or more of accounts receivable and 10% or more of net sales	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Customer A [Member]
% of Accounts receivable	13.00%	18.00%
% of Net sales	12.00%	15.00%
Customer B [Member]
% of Accounts receivable	12.00%	16.00%
% of Net sales	21.00%	17.00%