XML 85 R51.htm IDEA: XBRL DOCUMENT
v3.24.1

Income Taxes (Schedule of Roll Forward of Valuation Allowance) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Abstract] |  |  |
Balance at January 1 | $ 41,195 | $ 36,030 | $ 6,200
Currency transaction income (loss) | (3,295) | (1,316) | 2,425
Tax assets acquired through merger |  |  | 24,535
Income tax expense | 5,571 | 6,481 | 2,870
Balance at December 31 | $ 43,471 | $ 41,195 | $ 36,030

X
- Definition Amount of increase (decrease) in the valuation allowance due to currency transaction loss. + References No definition available. + Details
Name: | cmmb_CurrencyTransactionLossValuationAllowance
Namespace Prefix: | cmmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the valuation allowance due to income tax expense. + References No definition available. + Details
Name: | cmmb_IncomeTaxExpenseValuationAllowance
Namespace Prefix: | cmmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the valuation allowance due to tax assets acquired through merger. + References No definition available. + Details
Name: | cmmb_TaxAssetsAcquiredThroughMergerValuationAllowance
Namespace Prefix: | cmmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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