The percentage rate used to calculate dividend payments on preferred stock.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.12-12A(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12(Column A)(Footnote 4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-3

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-6

+ Details

Name:	us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479857/480-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479857/480-10-S50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479887/480-10-S45-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480244/480-10-S99-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480244/480-10-S99-1

+ Details

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

- Definition

Amount of proceeds receivable from qualified initial public offering.

+ References

No definition available.

+ Details

Name:	yb_MinimumProceedsReceivableFromQualifiedPublicOffering
Namespace Prefix:	yb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The minimum value of the company's pre-offering valuation under the law.

+ References

No definition available.

+ Details

Name:	yb_PreOfferingValueOfCompany
Namespace Prefix:	yb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Ratio applied to the conversion of temporary equity into ordinary shares.

+ References

No definition available.

+ Details

Name:	yb_TemporaryEquityConversionRatio
Namespace Prefix:	yb_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage on issue price for calculating liquidation preference value of temporary equity.

+ References

No definition available.

+ Details

Name:	yb_TemporaryEquityLiquidationPreferenceValuePercentageOnIssuePrice
Namespace Prefix:	yb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of simple interest on issue price for calculating liquidation preference value of temporary equity.

+ References

No definition available.

+ Details

Name:	yb_TemporaryEquityLiquidationPreferenceValueSimpleInterestOnIssuePrice
Namespace Prefix:	yb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the denominator used for calculation the number of days shares were held by the shareholder which is used for calculation redemption price.

+ References

No definition available.

+ Details

Name:	yb_TemporaryEquityRedemptionPriceDenominatorNumberOfDaysSharesHeld
Namespace Prefix:	yb_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage on original investment amount which is used to calculate the redemption price of temporary equity.

+ References

No definition available.

+ Details

Name:	yb_TemporaryEquityRedemptionPricePercentageOnOriginalInvestment
Namespace Prefix:	yb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the threshold percentage applied on number of days temporary shares were held by shareholder which is used for calculating the redemption price.

+ References

No definition available.

+ Details

Name:	yb_TemporaryEquityRedemptionPriceThresholdPercentageNumberOfDaysSharesHeld
Namespace Prefix:	yb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_StatementScenarioAxis=yb_LiquidationPreferenceValueWithSimpleInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=yb_LiquidationPreferenceValueWithoutSimpleInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_StatementClassOfStockAxis=yb_SeriesC1ConvertibleRedeemablePreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=yb_SeriesC2ConvertibleRedeemablePreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Preferred Shares (Details) $ in Millions	1 Months Ended					12 Months Ended	70 Months Ended
Preferred Shares (Details) $ in Millions	Apr. 30, 2025	Apr. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Preferred Shares
Proceeds from equity financing							$ 152.5
Pre-offering valuation						$ 1,500.0	1,500.0
Minimum proceeds from QIPO						$ 150.0	$ 150.0
Redemption price, Threshold percentage						8.00%
Redemption price, denominator						365 days
Redemption price, percentage on original investment						120.00%
Dividend percentage						8.00%
Temporary equity, conversion ratio	1
Liquidation preference value with simple interest
Preferred Shares
Liquidation preference value, percentage on issue price						120.00%
Liquidation preference value without simple interest
Preferred Shares
Liquidation preference value, percentage on issue price						100.00%
Liquidation preference value, percentage simple interest on issue price						8.00%
Series Seed Preferred Shares
Preferred Shares
Proceeds from equity financing					$ 4.0
Series Angel Preferred Shares
Preferred Shares
Proceeds from equity financing					$ 5.0
Series B Preferred Shares
Preferred Shares
Proceeds from equity financing				$ 30.0
Series C1 Preferred Shares
Preferred Shares
Proceeds from equity financing			$ 80.0
Series C2 Preferred Shares
Preferred Shares
Proceeds from equity financing		$ 33.5