|
Summary of Cash and Cash Equivalents (Detail) (USD $)
In Thousands, unless otherwise specified |
Oct. 31, 2014
|
Apr. 30, 2014
|
|---|---|---|
| Cash and Cash Equivalents [Line Items] | ||
| Total cash and cash equivalents | $ 32,855 | $ 31,934 |
|
Demand deposits accounts
|
||
| Cash and Cash Equivalents [Line Items] | ||
| Total cash and cash equivalents | 28,603 | 24,721 |
|
Money Market Funds
|
||
| Cash and Cash Equivalents [Line Items] | ||
| Total cash and cash equivalents | 4,149 | 6,971 |
|
Certificates of Deposit
|
||
| Cash and Cash Equivalents [Line Items] | ||
| Total cash and cash equivalents | 242 | |
|
Municipal Bonds
|
||
| Cash and Cash Equivalents [Line Items] | ||
| Total cash and cash equivalents | $ 103 |