XML 32 R22.htm IDEA: XBRL DOCUMENT
v3.23.3

Marketable Securities (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract] |
Schedule of amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value for available-for-sale securities by major security type and class of security |
|  | Amortized cost |  |  | Gross unrealized holding gains |  |  | Gross unrealized holding losses |  |  | Estimated fair value |
September 30, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US Treasury securities |  | $ | 3,281 |  |  | $ | — |  |  | $ | (3 | ) |  | $ | 3,278 |
Mutual funds |  |  | 1,169 |  |  |  | 2 |  |  |  | — |  |  |  | 1,171 |
Certificates of deposit |  |  | 859 |  |  |  | — |  |  |  | — |  |  |  | 859 |
Corporate bonds and notes |  | $ | 989 |  |  | $ | — |  |  | $ | (16 | ) |  | $ | 973 |
Total available-for-sale securities |  | $ | 6,298 |  |  | $ | 2 |  |  | $ | (19 | ) |  | $ | 6,281 |
Schedule of maturities of marketable securities classified as available-for-sale securities |
|  | Amortized cost |  |  | Estimated fair value |
Due within one year |  | $ | 5,715 |  |  | $ | 5,698 |
Due after one year through five years |  |  | 583 |  |  |  | 583 |
Due after five years |  |  | — |  |  |  | — |
Total available-for-sale securities |  | $ | 6,298 |  |  | $ | 6,281 |
Schedule of available-for-sale marketable securities with continuous gross unrealized loss position |
|  | Less than 12 months |  |  | More than 12 months |  |  | Total |
|  | Estimated fair value |  |  | Gross unrealized holding losses |  |  | Estimated fair value |  |  | Gross unrealized holding losses |  |  | Estimated fair value |  |  | Gross unrealized holding losses |
As of September 30, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US Treasury securities |  | $ | 3,278 |  |  | $ | (3 | ) |  | $ | — |  |  | $ | — |  |  | $ | 3,278 |  |  | $ | (3 | )
Corporate bonds and notes |  |  | 973 |  |  |  | (16 | ) |  |  | — |  |  |  | — |  |  |  | 973 |  |  |  | (16 | )
Total |  | $ | 4,251 |  |  | $ | (19 | ) |  | $ | — |  |  | $ | — |  |  | $ | 4,251 |  |  | $ | (19 | )

X
- Definition Tabular disclosure of maturities of available-for-sale securities. + References No definition available. + Details
Name: | clro_AvailableForSaleSecuritiesDebtMaturitiesTableTextBlock
Namespace Prefix: | clro_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of fair value of investment in marketable security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References No definition available. + Details
Name: | clro_MarketableSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | clro_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration