Segment Reporting - Additional Information (Detail)
$ in Thousands |
3 Months Ended |
|
|
Apr. 30, 2019
USD ($)
Segment
|
Apr. 30, 2018 |
Jan. 31, 2019
USD ($)
|
| Concentration Risk [Line Items] |
|
|
|
| Number of reportable segment | Segment |
1
|
|
|
| Property and equipment, net |
$ 6,383
|
|
$ 6,728
|
| Accounts receivable |
$ 26,457
|
|
$ 26,212
|
| Sales revenue, net [Member] | Wintech [Member] | Customer concentration risk [Member] |
|
|
|
| Concentration Risk [Line Items] |
|
|
|
| Percentage of revenue |
59.00%
|
58.00%
|
|
| Sales revenue, net [Member] | Chicony [Member] | Customer concentration risk [Member] |
|
|
|
| Concentration Risk [Line Items] |
|
|
|
| Percentage of revenue |
18.00%
|
11.00%
|
|
| Sales revenue, net [Member] | Hakuto [Member] | Customer concentration risk [Member] |
|
|
|
| Concentration Risk [Line Items] |
|
|
|
| Percentage of revenue |
|
12.00%
|
|
| Accounts receivable [Member] | Wintech [Member] | Credit concentration risk [Member] |
|
|
|
| Concentration Risk [Line Items] |
|
|
|
| Accounts receivable |
$ 13,200
|
|
|
| Accounts receivable [Member] | Chicony [Member] | Credit concentration risk [Member] |
|
|
|
| Concentration Risk [Line Items] |
|
|
|
| Accounts receivable |
8,300
|
|
|
| United States [Member] |
|
|
|
| Concentration Risk [Line Items] |
|
|
|
| Property and equipment, net |
2,000
|
|
|
| Asia Pacific [Member] |
|
|
|
| Concentration Risk [Line Items] |
|
|
|
| Property and equipment, net |
3,000
|
|
|
| Europe [Member] |
|
|
|
| Concentration Risk [Line Items] |
|
|
|
| Property and equipment, net |
$ 1,400
|
|
|