Marketable Securities - Additional Information (Detail) |
9 Months Ended | |
|---|---|---|
|
Sep. 30, 2016
USD ($)
Debt_Security
|
Dec. 31, 2015
USD ($)
Debt_Security
|
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| Marketable Securities [Abstract] | ||
| Realized gains or losses on marketable securities | $ 0 | |
| Number of debt securities held | Debt_Security | 31 | 28 |
| Aggregate fair value of debt securities | $ 31,547,702 | $ 21,137,424 |
| X | ||||||||||
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for less than one year or normal operating cycle, if longer, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. No definition available.
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| X | ||||||||||
- References No definition available.
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