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Long-Term Debt (Details) - USD ($)
$ in Thousands
Apr. 30, 2020
Jan. 31, 2020
Short-term debt $ 139 $ 0
Long-term debt, excluding current maturities 0 0
Long-term debt, current maturities 0 1,155
USA    
Short-term debt 0 0
Long-term debt, excluding current maturities 0 0
Long-term debt, current maturities 0 1,155
Argentina    
Short-term debt 139 0
Long-term debt, excluding current maturities 0 0
Long-term debt, current maturities $ 0 $ 0