XML 56 R43.htm IDEA: XBRL DOCUMENT v3.19.1
Trade Accounts and Financing Receivables - Additional Information (Details) - USD ($)
$ in Thousands
1 Months Ended
Apr. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Accounts Notes And Loans Receivable [Line Items]      
Trade accounts receivable   $ 21,314 $ 15,776
Single Customer      
Accounts Notes And Loans Receivable [Line Items]      
Trade accounts receivable   $ 8,200  
Single Customer | Subsequent Event      
Accounts Notes And Loans Receivable [Line Items]      
Proceeds from trade accounts receivable $ 6,200