XML 80 R68.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Income Taxes - Carryforwards (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2021
Operating Loss Carryforwards |  |  |
Net operating loss carryforwards with no expiration date |  |  | $ 293.8
Foreign pre-tax loss | $ 0.0 | $ 0.0 |
Federal |  |  |
Operating Loss Carryforwards |  |  |
Net operating loss carryforwards |  |  | 622.4
Federal | R&D credit |  |  |
Operating Loss Carryforwards |  |  |
Net operating loss carryforwards |  |  | 37.6
State |  |  |
Operating Loss Carryforwards |  |  |
Net operating loss carryforwards |  |  | 812.2
State | R&D credit |  |  |
Operating Loss Carryforwards |  |  |
Net operating loss carryforwards |  |  | $ 13.1
Australian Subsidiary |  |  |
Operating Loss Carryforwards |  |  |
Foreign Net Operating Loss written off |  | $ 14.9 |

X
- Definition Amount of operating loss carryforward with no expiration date, before tax effects, available to reduce future taxable income under enacted tax laws. + References No definition available. + Details
Name: | cldx_OperatingLossCarryforwardsNotSubjectToExpiration
Namespace Prefix: | cldx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of operating loss carryforward written off during the period. + References No definition available. + Details
Name: | cldx_OperatingLossCarryforwardsWrittenOff
Namespace Prefix: | cldx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.3) -URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_OperatingLossCarryforwardsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_InternalRevenueServiceIRSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=us-gaap_ResearchMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_AustralianTaxationOfficeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |