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Note 8 - Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Apr. 01, 2012
Dec. 31, 2012
Income Tax Expense (Benefit) $ 98 $ 102  
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax 12    
Deferred Tax Assets, Operating Loss Carryforwards     58,030
Deferred Tax Assets, Operating Loss Carryforwards, Foreign     12,390
Deferred Tax Assets, Operating Loss Carryforwards, Domestic     48,549
Operating Loss Carryforwards, Amount Recorded In Equity Upon Realization     $ 2,949
Operating Loss Carryforwards, Limitations on Use We have determined that a change in ownership, as defined under Internal Revenue Code Section382, occurred during 2005 and 2006. As such, the domestic net operating loss carryforwards will be subject to an annual limitation estimated to be in the range of approximately $12,000 to $14,500.The unused portion of the annual limitation can be carried forward to subsequent periods. We believe such limitation will not impact our ability to realize the deferred tax asset.The use of our U.K. net operating loss carryforwards may be limited due to the change in our U.K. operation during 2008 from a manufacturing and assembly center to primarily a distribution and service center.