|
Share-Based Compensation - Total Stock-Based Compensation Expense (Detail) (USD $)
|
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Total share-based compensation expense | $ 391,393 | $ 295,106 |
|
Research and Development [Member]
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Total share-based compensation expense | 132,543 | 111,206 |
|
General and Administrative [Member]
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Total share-based compensation expense | $ 258,850 | $ 183,900 |