XML 25 R15.htm IDEA: XBRL DOCUMENT v3.22.2.2

Transaction with related parties (Detail Textuals)	Sep. 19, 2022 USD ($)
Repurchase Arrangement
Related Party Transaction [Line Items]
Repurchase of ADSs	$ 2,500,000

X

- Definition

Represents the amount of repurchase of american depositary receipts.

+ References

No definition available.

+ Details

Name:	cmmb_RepurchaseOfAmericanDepositaryReceipts
Namespace Prefix:	cmmb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=cmmb_RepurchaseArrangementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: