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Major Category of Assets Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) | Sep. 30, 2013
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Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |
Assets | $ 34,049,823
Money Market Funds |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |
Assets | 9,188,883
U.S. Government and agency securities |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |
Assets | 5,681,927
Corporate and other debt securities |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |
Assets | 19,179,013
Quoted prices in active markets for identical assets (Level 1) |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |
Assets | 11,736,861
Quoted prices in active markets for identical assets (Level 1) | Money Market Funds |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |
Assets | 9,188,883
Quoted prices in active markets for identical assets (Level 1) | U.S. Government and agency securities |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |
Assets | 2,547,978
Significant other observable inputs (Level 2) |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |
Assets | 22,312,962
Significant other observable inputs (Level 2) | U.S. Government and agency securities |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |
Assets | 3,133,949
Significant other observable inputs (Level 2) | Corporate and other debt securities |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |
Assets | $ 19,179,013

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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