Revenue from Contracts with Customers - Contract Assets And Liabilities (Details) $ in Thousands |
3 Months Ended |
|---|---|
|
Apr. 30, 2018
USD ($)
| |
| Contract Assets: | |
| Unbilled revenue - current | $ 930 |
| Unbilled revenue - non-current | 0 |
| Total unbilled revenue | 930 |
| Contract Liabilities: | |
| Deferred revenue & customer deposits - current | 302 |
| Deferred revenue & customer deposits - non-current | 10 |
| Total deferred revenue & customer deposits | $ 312 |
| Minimum | |
| Contract With Customers [Line Items] | |
| Contract with customers, turn over period | 3 months |
| Maximum | |
| Contract With Customers [Line Items] | |
| Contract with customers, turn over period | 6 months |