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Note 5 - Restructuring (Detail) - Summary of Restructuring Liabilities (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Restructuring charges (credits)	$ (52,000)	$ (8,000)
Balance	400,000
October 2012 Plan [Member]
Balance	896,000
Restructuring charges (credits)	50,000
Cash payments	(736,000)
Balance	$ 210,000

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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