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Note 20 - Income Taxes (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Domestic Tax Authority [Member]    
Proceeds from Income Tax Refunds $ 0 $ 0
Operating Loss Carryforwards 132,040,000  
Foreign Tax Authority [Member]    
Proceeds from Income Tax Refunds 0 0
State and Local Jurisdiction [Member]    
Proceeds from Income Tax Refunds 30,000  
Operating Loss Carryforwards 137,645,000  
Mexican Subsidiaries [Member]    
Deferred Tax Assets, Foreign Deferred Revenue and Other Provision 4,033,000 2,556,000
Deferred Tax Assets, Net   2,556,000
Unrecognized Tax Benefits 200,000 200,000
Federal Income Tax Expense (Benefit), Continuing Operations 0 0
Undistributed Earnings of Foreign Subsidiaries 0  
Unrecognized Tax Benefits, Period Increase (Decrease) 0 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 0 0
State and Local Income Tax Expense (Benefit), Continuing Operations 120,000 33,000
Foreign Income Tax Expense (Benefit), Continuing Operations 2,195,000 1,063,000
Deferred Tax Assets, Foreign Deferred Revenue and Other Provision 4,033,000 2,556,000
Deferred Tax Assets, Net 0 2,556,000
Deferred Income Tax Expense (Benefit) $ 2,230,000 $ 1,050,000