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Long-Term Debt (Details 1)
$ in Thousands
Apr. 30, 2018
USD ($)
Debt Instrument [Line Items]  
Total $ 1,608
1 Year or less 335
2 Years 158
3 Years 1,115
4 Years 0
5 Years 0
After 5 Years 0
Borrowings In USA [Member]  
Debt Instrument [Line Items]  
Total 1,431
1 Year or less 158
2 Years 158
3 Years 1,115
4 Years 0
5 Years 0
After 5 Years 0
Borrowings in Argentina [Member]  
Debt Instrument [Line Items]  
Total 177
1 Year or less 177
2 Years 0
3 Years 0
4 Years 0
5 Years 0
After 5 Years $ 0