Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Sales (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Sales [Line Items]
Net Sales	$ 7,381	$ 7,672	$ 12,714	$ 12,974
United States [Member]
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Sales [Line Items]
Net Sales	6,603	6,937	11,335	11,724
International [Member]
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Sales [Line Items]
Net Sales	$ 778	$ 735	$ 1,379	$ 1,250