Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_AssetsHeldInTrustAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

+ Details

Name:	us-gaap_DerivativeLiabilitiesNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of transfers of financial instrument classified as a liability into (out of) level 3 of the fair value hierarchy.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

Name:	us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_LiabilitiesFairValueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_WarrantsAndRightsNoteDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=owlt_PublicWarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=owlt_PrivatePlacementWarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_CashMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_USTreasuryBillSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

FAIR VALUE MEASUREMENTS (Details) - USD ($)	6 Months Ended
FAIR VALUE MEASUREMENTS (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Sep. 17, 2020
Warrants [Abstract]
Fair value transfers into or out of Level 3 during the period	$ 0
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	$ 25,340,000	$ 23,530,000	$ 16,109,000	$ 16,290,000
Public Warrants [Member]
Warrants [Abstract]
Class of Warrant or Right, Outstanding	11,500,000	11,500,000
Private Placement Warrants [Member]
Warrants [Abstract]
Class of Warrant or Right, Outstanding	6,600,000	6,600,000
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability		$ 23,530,000
Cash [Member]
Assets Held-in-trust [Abstract]
Assets, Fair Value Disclosure	$ 753	753
US Treasury Securities [Member]
Assets Held-in-trust [Abstract]
Assets, Fair Value Disclosure	230,095,620	230,052,496
US Treasury Bill Securities [Member]
Assets Held-in-trust [Abstract]
Assets, Fair Value Disclosure		230,052,496
Fair Value, Recurring [Member]
Assets [Abstract]
Investments, Fair Value Disclosure	230,096,373	230,053,249
Fair Value, Recurring [Member] \| Public Warrants [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	16,100,000	14,950,000
Fair Value, Recurring [Member] \| Private Placement Warrants [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	9,240,000	8,580,000
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Investments, Fair Value Disclosure	230,096,373	230,053,249
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Public Warrants [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	16,100,000	14,950,000
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Private Placement Warrants [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Public Warrants [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Private Placement Warrants [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	9,240,000	8,580,000
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Assets [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Public Warrants [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Private Placement Warrants [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	$ 0	$ 0