v2.4.0.8

Summary of Cash and Cash Equivalents (Detail) (USD $) In Thousands, unless otherwise specified | Jul. 31, 2014 | Apr. 30, 2014
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Cash and Cash Equivalents [Line Items] |  |
Total cash and cash equivalents | $ 24,704 | $ 31,934
Demand deposits accounts |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash and cash equivalents | 21,674 | 24,721
Money Market Funds |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash and cash equivalents | 1,442 | 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 | 887 |
US Treasury securities |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash and cash equivalents | $ 701 |

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Details
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