XML 56 R45.htm IDEA: XBRL DOCUMENT
v3.21.2

Prepaid Expenses and Other Current Assets (Details) - Schedule of prepaid expenses and other current assets - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Schedule of prepaid expenses and other current assets [Abstract] |  |
Australia research and development credit receivable | $ 1,212 | $ 2,148
CRO prepayments | 693 | 1,211
Metals to be used in research and development | 1,691 | 31
Directors & Officers Insurance | 934 |
Other | 202 | 112
Total | $ 4,732 | $ 3,502

X
- Definition Australia research and development credit receivable + References No definition available. + Details
Name: | clnn_AustraliaResearchAndDevelopmentCreditReceivable
Namespace Prefix: | clnn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | clnn_CROPrepayments
Namespace Prefix: | clnn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Directors & Officers Insurance. + References No definition available. + Details
Name: | clnn_DirectorsOfficersInsurance
Namespace Prefix: | clnn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Metals to be used in research and development + References No definition available. + Details
Name: | clnn_MetalsToBeUsedInResearchAndDevelopment
Namespace Prefix: | clnn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6387103&loc=d3e6435-108320 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6787-107765 + Details
Name: | us-gaap_OtherPrepaidExpenseCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6787-107765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6387103&loc=d3e6435-108320 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 05 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123349782&loc=d3e5879-108316 + Details
Name: | us-gaap_PrepaidExpenseCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant