|
Stockholders' Equity (Detail) - Share-based Compensation Expense (USD $)
|
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2012
|
Jun. 30, 2011
|
Jun. 30, 2012
|
Jun. 30, 2011
|
|
| [AllocatedShareBasedCompensationExpense] | $ 313,707 | $ 253,917 | $ 543,562 | $ 508,660 |