XML 59 R48.htm IDEA: XBRL DOCUMENT v3.20.2
Summary of Significant Accounting Policies - Accounts Receivable - Allowance for Credit Losses (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at beginning of period $ 7,513  
Charged to operating expenses 679 $ 344
Write offs of accounts receivable, net of recoveries (190)  
Balance at end of period $ 8,002