Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
May 05, 2016 |
Apr. 30, 2017 |
Apr. 30, 2016 |
Jan. 31, 2017 |
May 05, 2017 |
|
| Business Acquisition [Line Items] | |||||
| Operating loss | $ (5,468) | $ (9,575) | |||
| DCC Labs [Member] | |||||
| Business Acquisition [Line Items] | |||||
| Percentage of equity interest acquired | 100.00% | ||||
| Payments to acquire business, paid in shares | $ 2,700 | ||||
| Net purchase price of acquired business | 7,883 | ||||
| Payments to acquire business | 5,243 | ||||
| Cash held in escrow | $ 500 | $ 300 | |||
| Shares initially held in escrow | 681,278 | 227,092 | |||
| Acquisition, goodwill identified | $ 7,300 | ||||
| Operating loss | $ 1,200 | ||||
| Business acquisition date | May 05, 2016 | ||||
| Business acquisition related costs | $ 200 | ||||