Net Loss Per Share Attributable to Common Stockholders - Antidilutive Securities Excluded from Computation of EPS (Details)	3 Months Ended
	Mar. 31, 2022 shares	Mar. 31, 2021 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share	36,600,529
Shares subject to vesting (in shares)	2,807,500
Redeemable Convertible Preferred Stock | Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Convertible preferred stock, conversion ratio	2.053	2.053
Old Owlet
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share		79,401,431
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share	9,866,965
Stock options | Old Owlet
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share		11,186,265
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share	6,557,326
PRSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share	1,842,105
ESPP shares committed
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share	234,133
Common stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share	18,100,000
Common stock warrants | Old Owlet
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share		942,623
Convertible notes | Old Owlet
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share		4,573,466
Preferred stock | Old Owlet
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share		61,809,312
Preferred stock warrants | Old Owlet
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common stock equivalents have been excluded from the computation of diluted net loss per share		889,765