XML 51 R56.htm IDEA: XBRL DOCUMENT v2.4.0.6
Movement of Uncertain Tax Positions (Detail) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Schedule of Unrecognized Tax Benefits [Line Items]      
Unrecognized tax benefit, beginning balance $ 1,594,597 $ 1,364,122 $ 1,223,250
Gross increases-accrued interest in current period 169,389 168,926 98,579
Settlements         
Reverse due to lapse of statute of limitations (322,378)    
Exchange rate translation 10,289 61,549 42,293
Unrecognized tax benefit, ending balance $ 1,451,897 $ 1,594,597 $ 1,364,122