XML 30 R35.htm IDEA: XBRL DOCUMENT v2.4.0.8
Compensation Plans - Summary of Company's Expenses Attributable to 401(k) Plan (Detail) (401(K) Plan, USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
401(K) Plan
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expenses attributable to the 401(k) Plan $ 334,259 $ 284,569 $ 658,003 $ 564,782