Debt - Summary of Future Aggregate Maturities of Notes Payable (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Debt Disclosure [Abstract]
Remainder of 2021	$ 2,401
2022	8,534
2023	6,000
2024	2,000
Total	$ 18,935

Long-Term debt, future aggregate maturity, remainder of fiscal year.

No definition available.

Name:	owlt_LongTermDebtFutureAggregateMaturityRemainderOfFiscalYear
Namespace Prefix:	owlt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant