FAIR VALUE - Carrying Amounts and Fair Values of Certain Assets and Liabilities (Detail) (USD $) | Mar. 31, 2014 | Dec. 31, 2013 |
Carrying Amount | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | $10,704,410 | $10,702,626 |
Carrying Amount | Short-term investments (money market funds and accrued income) | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 1,050,055 | 3,402,921 |
Carrying Amount | Obligations of U.S. Treasury, U.S. government corporations and agencies | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 3,779,156 | 2,748,850 |
Carrying Amount | Mortgaged-backed securities | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 76,386 | 81,112 |
Carrying Amount | Corporate debt securities | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 5,798,813 | 4,469,743 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term investments (money market funds and accrued income) | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Obligations of U.S. Treasury, U.S. government corporations and agencies | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgaged-backed securities | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 0 | 0 |
Significant Other Observable Inputs (Level 2) | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 10,704,410 | 10,702,626 |
Significant Other Observable Inputs (Level 2) | Short-term investments (money market funds and accrued income) | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 1,050,055 | 3,402,921 |
Significant Other Observable Inputs (Level 2) | Obligations of U.S. Treasury, U.S. government corporations and agencies | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 3,779,156 | 2,748,850 |
Significant Other Observable Inputs (Level 2) | Mortgaged-backed securities | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 76,386 | 81,112 |
Significant Other Observable Inputs (Level 2) | Corporate debt securities | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 5,798,813 | 4,469,743 |
Significant Unobservable Inputs (Level 3) | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Short-term investments (money market funds and accrued income) | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Obligations of U.S. Treasury, U.S. government corporations and agencies | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Mortgaged-backed securities | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Corporate debt securities | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' |
Total available-for-sale securities | $0 | $0 |