Note 13 - Segment Data (Details) - Geographic Revenue Related to North America and Foreign Regions (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 13 - Segment Data (Details) - Geographic Revenue Related to North America and Foreign Regions [Line Items]
Revenues	$ 4,322	$ 4,168	$ 3,818	$ 3,280	$ 3,204	$ 3,167	$ 3,470	$ 4,014	$ 15,588	$ 13,855	$ 21,993
Reportable Geographical Components [Member] | North America [Member]
Note 13 - Segment Data (Details) - Geographic Revenue Related to North America and Foreign Regions [Line Items]
Revenues									8,317	7,947	7,608
Reportable Geographical Components [Member] | Pacific Rim [Member]
Note 13 - Segment Data (Details) - Geographic Revenue Related to North America and Foreign Regions [Line Items]
Revenues									4,861	3,340	7,679
Reportable Geographical Components [Member] | Europe [Member]
Note 13 - Segment Data (Details) - Geographic Revenue Related to North America and Foreign Regions [Line Items]
Revenues									$ 2,410	$ 2,568	$ 6,706