Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Accounts Receivable (Details)

v3.19.3
Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Accounting Policies [Abstract]    
Accounts receivable $ 6,457 $ 6,882
Less allowances for doubtful accounts (3,216) (3,276)
Balance $ 3,241 $ 3,606