Inventories (Detail Textuals) - USD ($) $ in Millions	Apr. 30, 2018	Jan. 31, 2018	Apr. 30, 2017
Inventory Disclosure [Abstract]
Anticipated inventory return asset	$ 39.4	$ 39.4	$ 25.3

Represents the inventory return asset, which consists of the amount of goods that are anticipated to be returned by customers.

No definition available.