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Note 2 - Significant Accounting Policies (Details Textual)
 3 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Accounts Receivable [Member] | Customer Concentration Risk [Member]        
Number of Major Customers   1 1  
Concentration Risk, Percentage   11.00% 9.00%  
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]        
Number of Major Customers   0 0 0
Percentage of Revenue Considered for Accounting of Major Customer   7.00% 8.00% 6.00%
Ottomotores [Member]        
Financial Assumptions Including Sales Growth - Terminal Growth Rate 3.00%      
Financial Assumptions Including Sales Growth - Discount Rate 15.70%      
Fair Value, Inputs, Level 2 [Member]        
Debt Instrument, Fair Value Disclosure $ 918,319,000 $ 918,319,000    
Amortization of Financing Costs and Debt Discount Premium   5,429,000 $ 6,615,000 $ 4,772,000
Deferred Costs Amortization Expense, Next Twelve Months 5,355,000 5,355,000    
Deferred Costs Amortization Expense, Year Two 6,783,000 6,783,000    
Deferred Costs Amortization Expense, Year Three 7,048,000 7,048,000    
Deferred Costs Amortization Expense, Year Four 7,323,000 7,323,000    
Deferred Costs Amortization Expense, Year Five 3,134,000 3,134,000    
Goodwill, Impairment Loss 4,611,000 4,611,000  
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 36,076,000      
Advertising Expense   39,258,000 $ 32,352,000 19,910,000
Research and Development Expense   32,922,000 $ 31,494,000 $ 29,271,000
Long-term Debt $ 937,060,000 $ 937,060,000