Note 13 - Supplemental Balance Sheet Information (in thousands) (Details) - Property and equipment (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Note 13 - Supplemental Balance Sheet Information (in thousands) (Details) - Property and equipment [Line Items]
Property and equipment, gross	$ 15,111	$ 14,230
Less accumulated depreciation and amortization	13,072	12,453
Property and equipment, net	2,039	1,777	[1]
Equipment [Member]
Note 13 - Supplemental Balance Sheet Information (in thousands) (Details) - Property and equipment [Line Items]
Property and equipment, gross	8,513	8,366
Furniture and Fixtures [Member]
Note 13 - Supplemental Balance Sheet Information (in thousands) (Details) - Property and equipment [Line Items]
Property and equipment, gross	595	570
Leasehold Improvements [Member]
Note 13 - Supplemental Balance Sheet Information (in thousands) (Details) - Property and equipment [Line Items]
Property and equipment, gross	250	250
Software Development [Member]
Note 13 - Supplemental Balance Sheet Information (in thousands) (Details) - Property and equipment [Line Items]
Property and equipment, gross	$ 5,753	$ 5,044

[1] The Balance Sheet at December 31, 2012, is excerpted from the consolidated audited financial statements as of that date but does not include certain information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.