Summary of Significant Accounting Policies - Additional Information (Detail) - Customer |
3 Months Ended | ||
|---|---|---|---|
Jul. 31, 2016 |
Jul. 31, 2015 |
Apr. 30, 2016 |
|
| Accounting Policies [Abstract] | |||
| Number of clients that accounted for more than 10% of account receivables | 0 | 0 | |
| Number of clients that accounted for more than 10% of revenue | 0 | 0 | |
| Minimum [Member] | Software as a Service (“SaaS”) | |||
| Revenue Recognition, Multiple-deliverable Arrangements [Line Items] | |||
| Service agreement period | 1 year | ||
| Maximum [Member] | Software as a Service (“SaaS”) | |||
| Revenue Recognition, Multiple-deliverable Arrangements [Line Items] | |||
| Service agreement period | 3 years | ||