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VAT TAX ISSUE IN BRAZIL (Details Textual)
 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Oct. 31, 2010
USD ($)
Oct. 31, 2010
BRL
May 31, 2010
USD ($)
May 31, 2010
BRL
Oct. 31, 2009
USD ($)
Oct. 31, 2009
BRL
Jan. 31, 2014
USD ($)
Jan. 31, 2014
BRL
Jan. 31, 2013
USD ($)
Jan. 31, 2014
After State Amnesty Accepted [Member]
USD ($)
Jan. 31, 2014
After State Amnesty Accepted [Member]
BRL
Oct. 31, 2010
Claim 2007-2009 By State Of Bahia [Member]
USD ($)
Oct. 31, 2010
Claim 2007-2009 By State Of Bahia [Member]
BRL
Jan. 31, 2014
Claim December 2013 By State of Sao Paulo [Member]
USD ($)
Jan. 31, 2014
Maximum [Member]
Jan. 31, 2014
Minimum [Member]
Vat Tax Issue In Brazil [Line Items]                                
Foreign Currency Exchange Rate Translation1             1.82 1.82                
Value Added Tax Examination Claims Incurred In Period         $ 3,000,000 4,800,000               $ 45,000    
Value Added Tax Examination Penalties and Interest Expense         3,500,000 5,600,000               200,000    
Value Added Tax Examination Income Tax Total         6,500,000 10,400,000                    
Value Added Tax Claim Paid Amount     1,900,000 3,500,000                        
Value Added Tax Credit Carryforward Amount             1,100,000 2,100,000                
Other Tax Expense (Benefit)             1,600,000                  
Value Added Tax Fines and Penalties Defendable 600,000 1,300,000                            
Value Added Tax Payable During Period 5,500,000 12,900,000                            
Fines and penalties                       2,900,000 6,700,000      
Available For Credit 1,400,000 3,400,000           5,400,000 [1] 2,900,000 [1]              
Value Added Tax Judicial deposit             2,600,000 6,200,000                
Value Added Tax Judicial Tax Claim Percentage             20.00% 20.00%                
Value Added Tax Judicial Tax Claim Amount 2,600,000 6,200,000         6,600,000 15,400,000                
Formal Judicial Process Period                             10 years 5 years
Value Added Tax Claims Accepted Amnesty For Smaller Claim Periodic Payment                   18,000 42,000          
Value Added Tax Claims Percentage Of Abatement For Penalty And Interest                   80.00% 80.00%          
Value Added Tax Claims Penalty And Interest Accrued                   153,000            
Loss Contingency, Opinion of Counsel             our attorney informs us that R$1.0 (US $0.6) million will be successfully defended based on a lapse of statute of limitations and R$0.3 (US $0.2) million based on state auditor misunderstanding our attorney informs us that R$1.0 (US $0.6) million will be successfully defended based on a lapse of statute of limitations and R$0.3 (US $0.2) million based on state auditor misunderstanding                
Loss Contingency Accrual, Beginning Balance             $ 0                  
[1] The amount allowed as credit against future payments represents the VAT taxes actually previously paid to the neighboring state.