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Significant Contracts - Additional Information (Details) - Royalty Agreement With Qurate - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Significant Contract Revenue
Percentage of total net revenue	60.00%	53.00%
Accounts receivable	$ 4,460	$ 4,360
Percentage of total gross accounts receivables	50.00%	41.00%
Royalty [Member]
Significant Contract Revenue
Revenue	$ 17,610	$ 22,240

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