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Related party transactions (Details) (Company owned by President and Chief Executive Officer, USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Oct. 31, 2014
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Oct. 31, 2013
|
Oct. 31, 2014
|
Oct. 31, 2013
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|
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Company owned by President and Chief Executive Officer
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| Related Party Transaction [Line Items] | ||||
| Amounts paid under consulting agreement | $ 0 | $ 81 | $ 162 | $ 369 |