Intangible Assets - Additional Information (Detail) - USD ($)
|
3 Months Ended |
|
|
Apr. 30, 2019 |
Apr. 30, 2018 |
Jan. 31, 2019 |
Jun. 25, 2015 |
| Finite Lived Intangible Assets [Line Items] |
|
|
|
|
| Intangible assets, net of amortization expense |
$ 10,134,000
|
|
$ 10,936,000
|
|
| Accumulated amortization of intangible asset |
8,921,000
|
|
7,612,000
|
|
| Liabilities associated with noncancelable internal-use software license at net present value, current |
4,220,000
|
|
4,879,000
|
|
| Liabilities associated with noncancelable internal-use software license at net present value, non-current |
479,000
|
|
310,000
|
|
| Impairment of intangible assets |
0
|
$ 0
|
|
|
| IPR&D [Member] |
|
|
|
|
| Finite Lived Intangible Assets [Line Items] |
|
|
|
|
| Intangible assets, net of amortization expense |
4,100,000
|
|
4,100,000
|
|
| Accumulated amortization of intangible asset |
0
|
|
0
|
|
| IPR&D [Member] | Vis Lab SRL [Member] |
|
|
|
|
| Finite Lived Intangible Assets [Line Items] |
|
|
|
|
| Intangible assets acquired |
|
|
|
$ 4,100,000
|
| Internal-use software licenses [Member] |
|
|
|
|
| Finite Lived Intangible Assets [Line Items] |
|
|
|
|
| Intangible assets, net of amortization expense |
6,034,000
|
|
6,836,000
|
|
| Accumulated amortization of intangible asset |
8,921,000
|
|
$ 7,612,000
|
|
| Amortization expense |
$ 1,300,000
|
$ 1,100,000
|
|
|