XML 56 R46.htm IDEA: XBRL DOCUMENT
v3.21.2

Subsequent Events (Details) | Aug. 04, 2021
--- | ---
Subsequent Events. |
Subsequent Events |
Reverse stock split ratio | 0.167

X
- Definition Represents the reverse stock split ratio. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements. + References No definition available. + Details
Name: | catb_CommonStockReverseStockSplitRatio
Namespace Prefix: | catb_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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