Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Long-Lived Assets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Long-Lived Assets [Line Items]
Long-lived assets, net	$ 1,780	$ 2,408
United States [Member]
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Long-Lived Assets [Line Items]
Long-lived assets, net	1,730	2,350
International [Member]
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Long-Lived Assets [Line Items]
Long-lived assets, net	$ 50	$ 58