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Significant Contracts and Concentrations - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Product Information [Line Items]
Net revenue	$ 11,261	$ 7,391	$ 29,834	$ 21,968
Accounts receivable	10,949		10,949		$ 8,889
Sales [Member] | Customer Concentration Risk [Member] | QVC, Inc. [Member]
Product Information [Line Items]
Net revenue	$ 6,050	$ 4,700	$ 15,240	$ 13,440
Concentration Risk, Percentage	54.00%	64.00%	51.00%	61.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | QVC, Inc. [Member]
Product Information [Line Items]
Concentration Risk, Percentage			57.00%		50.00%
Accounts receivable	$ 6,190		$ 6,190		$ 4,460

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