Note 13 - Supplemental Balance Sheet Information (in thousands) (Detail) - Property and equipment (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Property and equipment, gross	$ 13,696	$ 12,920
Less accumulated depreciation and amortization	11,972	11,397
Property and equipment, net	1,724	1,523	[1]
Equipment [Member]
Property and equipment, gross	8,248	7,866
Furniture and Fixtures [Member]
Property and equipment, gross	545	543
Leasehold Improvements [Member]
Property and equipment, gross	250	250
Software Development [Member]
Property and equipment, gross	$ 4,653	$ 4,261

[1] The Balance Sheet at December 31, 2011, 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.