Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Accounts Receivable (Details)

v3.20.2
Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]      
Customer receivables $ 67,849 $ 79,899 $ 66,400
Other receivables 2,276 23  
Rebates receivable 2,845 957  
Allowance for doubtful accounts (2,316) (3,151)  
Total $ 70,654 $ 77,728