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Investment - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
|
| Schedule of Cost-method Investments [Line Items] | ||
| Investments, at cost | $ 250 | $ 250 |
| Licensing Agreements | ||
| Schedule of Cost-method Investments [Line Items] | ||
| Number of Common stock received in connection with license agreement | 57,000 | |
| Investments, at cost | $ 250 |