Debt (Details 1) $ in Thousands	Jul. 31, 2017 USD ($)
Debt Instrument [Line Items]
Total	$ 2,769
1 Year or less	638
2 Years	218
3 Years	1,291
4 Years	55
5 Years	52
After 5 Years	515
Revolving credit facility [Member]
Debt Instrument [Line Items]
Total	0
1 Year or less	0
2 Years	0
3 Years	0
4 Years	0
5 Years	0
After 5 Years	0
Borrowings In USA [Member]
Debt Instrument [Line Items]
Total	1,549
1 Year or less	158
2 Years	158
3 Years	1,233
Borrowings in Canada [Member]
Debt Instrument [Line Items]
Total	790
1 Year or less	50
2 Years	60
3 Years	58
4 Years	55
5 Years	52
After 5 Years	515
Borrowings in UK [Member]
Debt Instrument [Line Items]
Total	345
1 Year or less	345
2 Years	0
3 Years	0
4 Years	0
5 Years	0
After 5 Years	0
Borrowings in Argentina [Member]
Debt Instrument [Line Items]
Total	85
1 Year or less	85
2 Years	0
3 Years	0
4 Years	0
5 Years	0
After 5 Years	$ 0