XML 67 R55.htm IDEA: XBRL DOCUMENT v3.20.2
Trade Accounts and Bills Receivable, Net (Details Textual) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Trade Accounts and Bills Receivable, Net (Textual)    
Trade accounts and bills receivables $ 2,114,897 $ 2,159,356