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Merger - Narrative (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Jul. 15, 2021
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
Business Acquisition [Line Items]      
Vested (in shares) 496,717    
Consideration received | $ $ 9,890    
Shares subject to vesting (in shares)   2,807,500  
Proceeds from reverse recapitalization and PIPE financing | $ 133,889 $ 133,889 $ 0
Gross proceeds from merger | $   145,499  
Reverse recapitalization transaction, net of fees | $   101,261  
Common stock warrants received as part of the Merger | $   22,806 0
Assumed current assets and liabilities | $   66  
Deferred transaction costs | $   11,610 $ 0
General and administrative      
Business Acquisition [Line Items]      
Deferred transaction costs | $   5,370  
Additional Paid-in Capital      
Business Acquisition [Line Items]      
Reverse recapitalization transaction, net of fees | $ $ 101,259 $ 101,259  
Sandbridge      
Business Acquisition [Line Items]      
Net proceeds from Initial Public Offering and Private Placement per unit (in dollars per share) | $ / shares $ 10.00    
Redemption of stock, cash paid | $ $ 197,588    
Number of shares subject to forfeiture (in shares)   2,807,500  
Shares subject to vesting (in shares)   2,807,500  
Gross proceeds from initial public offering | $   $ 213,407  
Transaction cost | $ $ 16,980    
Sandbridge | PIPE Investors      
Business Acquisition [Line Items]      
Net proceeds from Initial Public Offering and Private Placement per unit (in dollars per share) | $ / shares $ 10.00    
Sale of stock, shares issued in transaction (in shares) 12,968,000    
Proceeds from reverse recapitalization and PIPE financing | $ $ 129,680    
Class B Non-redeemable Common Stock | Sandbridge      
Business Acquisition [Line Items]      
Conversion of redeemable convertible preferred stock into common stock in connection with the reverse recapitalization (in shares) 5,750,000    
Number of shares subject to forfeiture (in shares) 2,807,500    
Shares subject to vesting (in shares) 2,807,500    
Common Class A | Sandbridge      
Business Acquisition [Line Items]      
Stock redeemed or called during period (in shares) 19,758,773    
Conversion of stock, shares converted (in shares) 3,241,227    
Conversion of redeemable convertible preferred stock into common stock in connection with the reverse recapitalization (in shares) 3,241,227    
Old Owlet      
Business Acquisition [Line Items]      
Preferred stock, conversion basis All 30,104,000 outstanding shares of Old Owlet redeemable convertible preferred stock were converted into an equivalent number of shares of Old Owlet common stock on a one-to-one basis.    
Preferred stock, convertible, conversion price (in dollars per share) | $ / shares $ 3.1546    
Warrants exercised 429,314    
Convertible preferred stock, conversion ratio 2.053    
Common stock exchanged (in shares) 90,824,573    
Net proceeds from Initial Public Offering and Private Placement per unit (in dollars per share) | $ / shares $ 20.53    
Old Owlet | Related Party Convertible Promissory      
Business Acquisition [Line Items]      
Principal and accrued interest | $ $ 7,122    
Amount of convertible notes redeemed for cash | $ $ 2    
Old Owlet | Class B Non-redeemable Common Stock      
Business Acquisition [Line Items]      
Preferred stock outstanding (in shares) 30,104,000    
Old Owlet | Common Class A      
Business Acquisition [Line Items]      
Preferred stock outstanding (in shares) 30,104,000    
Old Owlet | Preferred Stock Series A      
Business Acquisition [Line Items]      
Warrants exercised 433,356