Accounts Receivable - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance doubtful accounts, receivables	$ 780		$ 780		$ 944
Current period provision			$ 18	$ 307
Selling, General and Administrative Expenses
Financing Receivable, Allowance for Credit Loss [Line Items]
Current period provision	$ 40	$ 221