Operating leases - Schedule of Supplemental Cash Flow Information Related to Operating Leases (Detail) $ in Thousands |
3 Months Ended |
|---|---|
|
Apr. 30, 2019
USD ($)
| |
| Cash paid for amounts included in the measurement of lease liabilities | |
| Operating cash flows from operating leases | $ 206 |
| Right-of-use assets obtained in exchange for lease obligations | |
| Operating leases | $ 348 |