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v3.19.1

Note 2 - Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Property, Plant and Equipment, Useful Life [Table Text Block] |
Asset |  | Estimated useful lives (in years) |
Computer equipment and software |  |  | 3 |
Laboratory and manufacturing equipment |  |  | 3 |
Furniture and fixtures |  |  | 3 |
Leasehold improvements |  | 5 years or lease term, if shorter |

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- Definition Tabular disclosure of the estimated useful lives of property, plant and equipment. + References No definition available. + Details
Name: | bcda_PropertyPlantAndEquipmentUsefulLifeTableTextBlock
Namespace Prefix: | bcda_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration