Debt (Details 1) $ in Thousands	Apr. 30, 2017 USD ($)
Debt Instrument [Line Items]
Total	$ 3,100
1 Year or less	2,422
2 Years	29
3 Years	31
4 Years	33
5 Years	35
After 5 Years	550
Revolving credit facility [Member]
Debt Instrument [Line Items]
Total	2,363
1 Year or less	2,363
2 Years	0
3 Years	0
4 Years	0
5 Years	0
After 5 Years	0
Borrowings in Canada [Member]
Debt Instrument [Line Items]
Total	728
1 Year or less	50
2 Years	29
3 Years	31
4 Years	33
5 Years	35
After 5 Years	550
Borrowings in UK [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 Argentina [Member]
Debt Instrument [Line Items]
Total	9
1 Year or less	9
2 Years	0
3 Years	0
4 Years	0
5 Years	0
After 5 Years	$ 0