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Significant Contracts - Additional Information (Details) - Royalty Agreement With Qurate - USD ($) $ in Thousands | 12 Months Ended
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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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