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Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jan. 13, 2020
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Aug. 14, 2020
Goodwill and Intangible Assets Disclosure [Abstract]          
Indefinite lived license agreements         $ 8.5
Intangible assets explanation description On January 13, 2020, Purple LLC entered into a supply and services agreement with a third party whereby the Company acquired a license and made a prepayment for future products and services to be provided by the third party. The $4.0 million paid upon execution of the contract was allocated to a license for certain technologies ($2.2 million), inventory to be utilized by the third party in the production of goods ($0.8 million) and future professional services to be delivered by the third party ($1.0 million). On October 13, 2020, Purple LLC filed suit against the third party for alleged violations under the contract. In response, the third party filed a counter lawsuit against Purple LLC. These lawsuits effectively ended any future performance under the contract.        
Impairment charge of unamortized license costs   $ 0.6 $ 0.6    
Prepaid professional fees   0.8      
Prepaid inventory   $ 0.3      
Amortization expense     $ 2.4 $ 0.7