Revenues and Trade Receivables, Net, Summary of Activity with Sales Related Allowances and Accruals (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Accounts Receivable Allowances and Accruals [Roll Forward]
Balance at December 31, 2020	$ 2,138
Provision	6,769
Payments / credits	(5,920)
Balance at June 30, 2021	2,987
Accrued balances - Trade and other receivables, net	454	$ 416
Accrued balances - Accounts payable and accrued expense	$ 2,533	$ 1,722