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Related Party Transactions (Details) - BFLY Operations Inc - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]    
Due from related parties $ 38 $ 829
Due to related parties 154 6
Catalyzer 4 Member    
Related Party Transaction [Line Items]    
Rent expense 500 400
Impairment charge 1,400  
Prepaid advance   1,500
Amended And Restated Technology Services Agreement Member    
Related Party Transaction [Line Items]    
Due from related parties 40 0
Due to related parties $ 10 0
Term for paid or receivable amounts (in days) 30 days  
Amended And Restated Technology Services Agreement Member | Catalyzer 4 Member    
Related Party Transaction [Line Items]    
Expenses incurred $ 5,100 7,300
Due from related parties 0 800
Due to related parties $ 100 $ 0