Marketable Securities (Detail) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Dec. 31, 2014 |
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| Marketable securities, Cost | $ 20,002 | ||
| Marketable securities, Unrealized Gain/(Loss) | $ 11 | $ 0 | 0 |
| Marketable securities, Fair value | 39,951 | 20,002 | |
| U.S. treasury bill | |||
| Marketable securities, Cost | 39,940 | 19,998 | |
| Marketable securities, Unrealized Gain/(Loss) | 11 | 0 | |
| Marketable securities, Fair value | $ 39,951 | 19,998 | |
| Mutual fund | |||
| Marketable securities, Cost | 4 | ||
| Marketable securities, Unrealized Gain/(Loss) | 0 | ||
| Marketable securities, Fair value | $ 4 | ||
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- Definition Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Cost of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. No definition available.
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- Definition Amount of unrealized holding gain (loss) recognized in the income statement for investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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