XML 20 R28.htm IDEA: XBRL DOCUMENT v2.4.0.8
Investments in Foreign Joint Ventures - Additional Information (Detail) (USD $)
 6 Months Ended
Jun. 30, 2014
Joint_Ventures
Dec. 31, 2013
Schedule Of Equity Method Investments [Line Items]    
Interest in joint venture foreign 2  
Withdrawal from joint venture $ 636,000  
Proceeds from Interest in joint venture received 46,000  
Accumulated statutory reserves in equity method investments 1,860,000 1,860,000
BOMAY
    
Schedule Of Equity Method Investments [Line Items]    
Interest in Joint Venture 40.00%  
Baoji Oilfield Machinery Co. Ltd.
    
Schedule Of Equity Method Investments [Line Items]    
Interest in Joint Venture 51.00%  
AA Energies, Inc.
    
Schedule Of Equity Method Investments [Line Items]    
Interest in Joint Venture 9.00%  
MIEFE
    
Schedule Of Equity Method Investments [Line Items]    
Interest in Joint Venture 41.00%  
MIEFE's general manager
    
Schedule Of Equity Method Investments [Line Items]    
Interest in Joint Venture 8.00%  
Sonepar of France
    
Schedule Of Equity Method Investments [Line Items]    
Interest in Joint Venture 51.00%  
AAG
    
Schedule Of Equity Method Investments [Line Items]    
Interest in Joint Venture 49.00%  
Withdrawal from joint venture 636,000  
Proceeds from Interest in joint venture received $ 46,000  
LTDA
    
Schedule Of Equity Method Investments [Line Items]    
Interest in Joint Venture 51.00%