Class of Warrant or Right, Exercisable.

No definition available.

Name:	opad_ClassOfWarrantOrRightExercisable
Namespace Prefix:	opad_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Derivative Warrant Liabilities.

+ References

No definition available.

+ Details

Name:	opad_DerivativeWarrantLiabilitiesLineItems
Namespace Prefix:	opad_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Warrant Expiration Period after Completionof Business Combination or Earlier upon Redemptionor Liquidation Date

+ References

No definition available.

+ Details

Name:	opad_WarrantExpirationPeriodAfterCompletionofBusinessCombinationOrEarlierUponRedemptionorLiquidationDate
Namespace Prefix:	opad_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the warrants or rights are exercisable, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRighstDateFromWhichWarrantsOrRightsExercisable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- 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

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Warrant Liabilities - Additional Information (Details) - $ / shares	6 Months Ended
	Jun. 30, 2025	Jan. 26, 2026	Jul. 25, 2025
Derivative Warrant Liabilities [Line Items]
Warrants expiration period after completion of business combination or earlier upon redemption or liquidation date	Sep. 01, 2026
Class A Common Stock
Derivative Warrant Liabilities [Line Items]
Number of warrants or rights, excercisable	15
Class A Common Stock \| Public Warrant
Derivative Warrant Liabilities [Line Items]
Class of warrant or right outstanding	16,100,000
Warrants exercisable	$ 172.5
Class A Common Stock \| Private Placement
Derivative Warrant Liabilities [Line Items]
Class of warrant or right outstanding	5,700,000
Class A Common Stock \| 2025 Warrants
Derivative Warrant Liabilities [Line Items]
Warrants expiration period	Jan. 26, 2030
Class A Common Stock \| Subsequent Event
Derivative Warrant Liabilities [Line Items]
Class of warrant or right outstanding			1,428,571
Class A Common Stock \| Subsequent Event \| 2025 Warrants
Derivative Warrant Liabilities [Line Items]
Class of warrant or right outstanding			1,428,571
Warrants exercisable		$ 2.3