Note 13 - Supplemental Balance Sheet Information (in thousands) (Detail) - Property and equipment (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Property and equipment, gross	$ 14,534	$ 14,230
Less accumulated depreciation and amortization	12,673	12,453
Property and equipment, net	1,861	1,777	[1]
Equipment [Member]
Property and equipment, gross	8,466	8,366
Furniture and Fixtures [Member]
Property and equipment, gross	574	570
Leasehold Improvements [Member]
Property and equipment, gross	250	250
Software Development [Member]
Property and equipment, gross	$ 5,244	$ 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.