Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | |||
|---|---|---|---|---|
Apr. 30, 2018 |
Apr. 30, 2017 |
Jan. 31, 2018 |
Jan. 31, 2017 |
|
| Goodwill And Intangible Assets Disclosure [Abstract] | ||||
| Goodwill | $ 25,165 | $ 25,579 | $ 23,287 | |
| Amortization of intangible assets | $ 400 | $ 600 | ||
| X | ||||||||||
- Definition Amortization expense charged to cost of product revenue and operating expense. No definition available.
|
| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|