Note 18 - Income Taxes (Details) (USD $)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Note 18 - Income Taxes (Details) [Line Items]
Income Tax Expense (Benefit)	$ 39,607,000	$ 45,011,000	$ (8,233,000)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	2,707,000	0
Deferred Tax Assets, Valuation Allowance	14,781,000	13,062,000
Deferred Tax Assets, Other	11,103,000	9,238,000
Income Taxes Paid	36,225,000	35,269,000	(54,781,000)
Proceeds from Income Tax Refunds			67,092,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	30,310,000
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	8,723,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	50,112,000
Sale of Facility Brazil [Member]
Note 18 - Income Taxes (Details) [Line Items]
Deferred Tax Assets, Valuation Allowance		17,500,000
Capital Loss Carryover in Brazil [Member]
Note 18 - Income Taxes (Details) [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount		6,363,000
Loss [Member] | Canada [Member]
Note 18 - Income Taxes (Details) [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount		935,000
Loss [Member]
Note 18 - Income Taxes (Details) [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	1,588,000	284,000
Foreign Currency Translation [Member] | Canada [Member]
Note 18 - Income Taxes (Details) [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	425,000
Foreign Currency Translation [Member]
Note 18 - Income Taxes (Details) [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount		651,000
Brazil [Member]
Note 18 - Income Taxes (Details) [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount			1,799,000
Canada [Member]
Note 18 - Income Taxes (Details) [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	2,013,000
Cellulosic Biofuel Credit [Member]
Note 18 - Income Taxes (Details) [Line Items]
Income Tax Expense (Benefit)	4,586,000	9,040,000
Deferred Tax Assets, Other	63,765,000	70,161,000
Income Taxes Receivable, Current	3,013,000	198,000
Expenditures [Member]
Note 18 - Income Taxes (Details) [Line Items]
Income Tax Expense (Benefit)		3,650,000	3,888,000
Expiring in 2017 [Member]
Note 18 - Income Taxes (Details) [Line Items]
Operating Loss Carryforwards	17,648,000
Minimum [Member]
Note 18 - Income Taxes (Details) [Line Items]
Deferred Tax Assets, Valuation Allowance	13,062	13,062,000
Maximum [Member]
Note 18 - Income Taxes (Details) [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 14,781	$ 23,806,000