Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Apr. 30, 2018 |
Apr. 30, 2017 |
Jan. 31, 2018 |
|
| Accounting Policies [Abstract] | |||
| Related party transactions | $ 0 | $ 0 | |
| Amounts payable to or receivable from related parties | $ 0 | $ 0 | |