XML 42 R32.htm IDEA: XBRL DOCUMENT
v3.22.2

Marketable Securities - Available-for-sale Securities by Major Security Type (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Marketable Securities [Line Items] |  |
Amortized cost |  | $ 3,007
Gross unrealized holding gains |  | 8
Gross unrealized holding losses |  | (5)
Estimated fair value | $ 0 | 3,010
Corporate bonds and notes [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost |  | 1,434
Gross unrealized holding gains |  | 8
Gross unrealized holding losses |  | (2)
Estimated fair value |  | 1,440
Municipal bonds [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost |  | 1,573
Gross unrealized holding gains |  | 0
Gross unrealized holding losses |  | (3)
Estimated fair value |  | $ 1,570

X
- Definition The amount of accumulated gross unrealized gain on investment in marketable securities classified as available-for-sale securities. + References No definition available. + Details
Name: | clro_AvailableForSaleMarketableSecuritiesAccumulatedGrossUnrealizedGain
Namespace Prefix: | clro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of accumulated gross unrealized loss on investment in marketable securities classified as available-for-sale securities. + References No definition available. + Details
Name: | clro_AvailableForSaleMarketableSecuritiesAccumulatedGrossUnrealizedLoss
Namespace Prefix: | clro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of amortized cost of marketable securities classified as available-for-sale securities. + References No definition available. + Details
Name: | clro_AvailableForSaleMarketableSecuritiesAmortizedCost
Namespace Prefix: | clro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in marketable security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_MarketableSecurities
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_MarketableSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |