Note 15 - Income Taxes (Details Textual) - USD ($)	1 Months Ended	9 Months Ended
	Aug. 31, 2016	Sep. 30, 2016
Minimum [Member] | Statute of Limitations [Member]
Number of Years		3 years
Maximum [Member] | Statute of Limitations [Member]
Number of Years		7 years
Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member]
Income Tax Examination, Year under Examination		2004
Internal Revenue Service (IRS) [Member] | Latest Tax Year [Member]
Income Tax Examination, Year under Examination		2009
Internal Revenue Service (IRS) [Member] | Tax Year 2009 [Member]
Income Tax Examination, Potential Penalty, Percent		100.00%
Income Tax Examination, Penalties Expense		$ 40,900,000
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority		(100,000)
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities		2,000,000
Mexican Tax Authority [Member] | Tax Year 2010 [Member]
Income Tax Examination, Year under Examination	2010
Tax Assessment Estimated Tax Expense	$ 33,700,000
Tax Assessment Estimated Interest Expense	16,600,000
Tax Assessment Estimated Penalties Expense	11,400,000
Taxes Payable	$ 0
Deferred Tax Assets, Valuation Allowance		$ 63,500,000