Segment Information, Significant Customers and Geographic Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail) - USD ($)
$ in Thousands |
3 Months Ended |
Apr. 30, 2019 |
Apr. 30, 2018 |
| Segment Reporting Information [Line Items] |
|
|
| Total revenue |
$ 8,485
|
$ 14,935
|
| Customer Concentration Risk [Member] | Total Revenue [Member] |
|
|
| Segment Reporting Information [Line Items] |
|
|
| % of total revenues |
17.00%
|
|
| North America [Member] |
|
|
| Segment Reporting Information [Line Items] |
|
|
| Total revenue |
$ 4,089
|
$ 7,114
|
| North America [Member] | Customer Concentration Risk [Member] | Total Revenue [Member] |
|
|
| Segment Reporting Information [Line Items] |
|
|
| % of total revenues |
49.00%
|
48.00%
|
| Europe and Middle East [Member] |
|
|
| Segment Reporting Information [Line Items] |
|
|
| Total revenue |
$ 2,970
|
$ 6,023
|
| Europe and Middle East [Member] | Customer Concentration Risk [Member] | Total Revenue [Member] |
|
|
| Segment Reporting Information [Line Items] |
|
|
| % of total revenues |
35.00%
|
40.00%
|
| Latin America [Member] |
|
|
| Segment Reporting Information [Line Items] |
|
|
| Total revenue |
$ 1,047
|
$ 1,496
|
| Latin America [Member] | Customer Concentration Risk [Member] | Total Revenue [Member] |
|
|
| Segment Reporting Information [Line Items] |
|
|
| % of total revenues |
12.00%
|
10.00%
|
| Asia Pacific [Member] |
|
|
| Segment Reporting Information [Line Items] |
|
|
| Total revenue |
$ 379
|
$ 302
|
| Asia Pacific [Member] | Customer Concentration Risk [Member] | Total Revenue [Member] |
|
|
| Segment Reporting Information [Line Items] |
|
|
| % of total revenues |
4.00%
|
2.00%
|