XML 32 R40.htm IDEA: XBRL DOCUMENT v2.4.0.8
Major Category of Assets Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $)
Jun. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Assets $ 33,863,100
Money Market Funds
  
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Assets 8,403,979
U.S. Government and agency securities
  
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Assets 5,577,087
Corporate and other debt securities
  
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Assets 19,882,034
Quoted prices in active markets for identical assets (Level 1)
  
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Assets 10,560,498
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 8,403,979
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 2,156,519
Significant other observable inputs (Level 2)
  
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Assets 23,302,602
Significant other observable inputs (Level 2) | U.S. Government and agency securities
  
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Assets 3,420,568
Significant other observable inputs (Level 2) | Corporate and other debt securities
  
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]  
Assets $ 19,882,034