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Note 9 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Jan. 01, 2015	Dec. 31, 2014
Deferred Income Tax Expense (Benefit) Asset Impairment Charges		$ (51,000)
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 0	150,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(1,262,000)	6,642,000
Valuation Allowance, Deferred Tax Assets, Change in Amount Due to Settlement of Uncertain Tax Position		7,296,000
Valuation Allowance, Deferred Tax Assets, Change in Amount, Other		654,000
Increase in Net Operating Loss Carry Forward, Resulting from Settlement of Uncertain Tax Position		21,400,000
Unrecognized Tax Benefits	0		$ 7,296,000	$ 7,296,000
Deferred Tax Assets, Valuation Allowance	33,331,000	34,593,000
Undistributed Earnings of Foreign Subsidiaries	0	0
Domestic Tax Authority [Member]
Operating Loss Carryforwards	70,976,000
Tax Credit Carryforward, Amount	$ 1,704,000
Domestic Tax Authority [Member] | Earliest Tax Year [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year	2001
Domestic Tax Authority [Member] | Latest Tax Year [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year	2016
Domestic Tax Authority [Member] | Capital Loss Carryforward [Member]
Operating Loss Carryforwards	$ 3,223,000
Foreign Tax Authority [Member]
Operating Loss Carryforwards	12,760,000
Deferred Tax Assets, Valuation Allowance	$ 0	0
Foreign Tax Authority [Member] | Earliest Tax Year [Member]
Open Tax Year	2009
Foreign Tax Authority [Member] | Latest Tax Year [Member]
Open Tax Year	2016
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Open Tax Year	2001
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Open Tax Year	2016
Trademarks [Member]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		$ 150,000

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The amount of deferred income tax expense (benefit) related to asset impairment charges.

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