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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 |  |

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