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Fair Value Measurements - Assets Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands | Apr. 30, 2016 | Jan. 31, 2016
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money Market Funds (included in Cash and Cash Equivalents) | $ 6,003 | $ 4,340
State and Municipal Obligations (included in Securities Available for Sale) | 8,774 | 10,376
Total | 14,777 | 14,716
Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money Market Funds (included in Cash and Cash Equivalents) | 6,003 | 4,340
Total | 6,003 | 4,340
Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
State and Municipal Obligations (included in Securities Available for Sale) | 8,774 | 10,376
Total | $ 8,774 | $ 10,376

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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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