Note 8 - Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012	Dec. 31, 2012
Note 8 - Income Taxes (Details) [Line Items]
Income Tax Expense (Benefit)	$ 53,000	$ 171,000	$ 151,000	$ 262,000
Deferred Tax Assets, Operating Loss Carryforwards					58,030,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign					12,390,000
Deferred Tax Assets, Operating Loss Carryforwards, Domestic					48,549,000
Operating Loss Carryforwards, Amount Recorded In Equity Upon Realization					2,949,000
Operating Loss Carryforwards, Limitations on Use			We have determined that changes 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.
Three Months Ended [Member]
Note 8 - Income Taxes (Details) [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	0		0
Six Months Ended [Member]
Note 8 - Income Taxes (Details) [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	12,000		12,000
Minimum [Member]
Note 8 - Income Taxes (Details) [Line Items]
Operating Loss Carryforward Estimated Limit	12,000		12,000
Maximum [Member]
Note 8 - Income Taxes (Details) [Line Items]
Operating Loss Carryforward Estimated Limit	$ 14,500		$ 14,500