Represents the number of shares of the post-merger entity for which one share of the pre-merger entity may be received.

No definition available.

Name:	bcda_BusinessCombinationNumberOfSharesOfPostMergerEntityForEachShareOfPreMergerEntity
Namespace Prefix:	bcda_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the percentage of the combined company held by the acquirer (on a fully diluted basis) immediately following the closing of the merger transaction.

+ References

No definition available.

+ Details

Name:	bcda_BusinessCombinationPercentageOfCombinedCompanyOwnedByAcquirerImmediatelyAfterMerger
Namespace Prefix:	bcda_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the percentage of holders of issued and outstanding shares of voting Stock that authorized the company's Board of Directors to approve reverse stock split.

+ References

No definition available.

+ Details

Name:	bcda_HoldersOfIssuedAndOutstandingSharesOfVotingStockAgreedWithReverseStockSplitPercent
Namespace Prefix:	bcda_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

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(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

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(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

+ Details

Name:	us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=bcda_MergerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_NonmonetaryTransactionTypeAxis=bcda_ReverseStockSplitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 1 - Summary of Business (Details Textual)	Nov. 03, 2017	Dec. 31, 2017 shares	Sep. 25, 2017	Dec. 31, 2016 shares	Oct. 24, 2016 shares
Holders of Issued and Outstanding Shares of Voting Stock Agreed with Reverse Stock Split, Percent			63.60%
Common Stock, Shares Authorized		100,000,000		750,000,000
Preferred Stock, Shares Authorized		25,000,000		50,000,000
Merger [Member]
Business Combination, Percentage of Combined Company Owned By Acquirer Immediately After Merger					54.00%
Business Combination, Number of Shares of Post-merger Entity for Each Share of Pre-merger Entity					1.6139834
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	12