XML 73 R51.htm IDEA: XBRL DOCUMENT v3.19.3
Accounts Receivable (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Accounts Receivable Additional Disclosures [Abstract]          
Allowance doubtful accounts, receivables $ 1,152   $ 1,152   $ 932
Reserve for (income) from uncollectable accounts $ (96) $ (267) $ 8 $ (986)