Name:	bcda_DebtInstrumentConvertibleAutomaticConversionOfPrincipleAndAccruedInterestIntoSharesOfCommonStockPercentageOfPriceOfSharesPurchasedInIPO
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Represents the percentage of the price of the convertible notes to be issued that is to be used to calculate the conversion price under a convertible debt instrument’s principal and interest conversion to common stock.

No definition available.

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Represents the percentage of warrant coverage under the Optional Conversion Right, if the instrument is held to maturity, under which the outstanding principle and interest on the convertible debt instrument may be converted into shares of the preferred stock.

No definition available.

Name:	bcda_DebtInstrumentConvertibleOptionalConversionRightAtMaturityWarrantCoveragePercent
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Data Type:	num:percentItemType
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Represents the percentage of the price of the preferred shares which is used to calculate the conversion price of the Optional Conversion Right, under which the outstanding principle and interest on the convertible debt instrument may be converted into shares of the preferred stock.

No definition available.

Name:	bcda_DebtInstrumentConvertibleOptionalConversionRightConversionPricePercentageOfThePriceOfThePreferredShares
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Data Type:	num:percentItemType
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Represents the aggregate sales proceeds in a private placement of preferred stock which, if equaled or exceeded, will trigger the Optional Conversion Right, under which the outstanding principle and interest on the convertible debt instrument may be converted into shares of the preferred stock.

No definition available.

Name:	bcda_DebtInstrumentConvertibleOptionalConversionRightTriggerPrivatePlacementOfPreferredStockAggregateSalesProceeds
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Data Type:	xbrli:monetaryItemType
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Represents the percentage of warrant coverage under the Optional Conversion Right, under which the outstanding principle and interest on the convertible debt instrument may be converted into shares of the preferred stock.

No definition available.

Name:	bcda_DebtInstrumentConvertibleOptionalConversionRightWarrantCoveragePercent
Namespace Prefix:	bcda_
Data Type:	num:percentItemType
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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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Period Type:	duration

The price per share of the conversion feature embedded in the debt instrument.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

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Data Type:	num:perShareItemType
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Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	num:percentItemType
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Period Type:	instant

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_DebtInstrumentTerm
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Amount of the cost of borrowed funds accounted for as interest expense.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.9)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Name:	us-gaap_InterestExpense
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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Data Type:	na
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Name:	us-gaap_BusinessAcquisitionAxis=bcda_MergerMember
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