XML 90 R77.htm IDEA: XBRL DOCUMENT v3.22.0.1

Note 4 - Insurance SPAC Investments and Other Recent Events - Schedule of Consolidated Other Investments Shares (Details) (Parentheticals) - Operating LLC [Member]	Dec. 31, 2021 $ / shares
Metromile, Shares Become Freely Tradeable When Share Price Exceedes a Specified Amount, Tranche One [Member]
Investment Owned, Stock Price Trigger (in dollars per share)	$ 15.00
Investment Owned, Threshold Trading Days	20
Investment Owned, Threshold Consecutive Trading Days	30
Metromile, Shares Become Freely Tradeable When Share Price Exceedes a Specified Amount, Tranche Two [Member]
Investment Owned, Stock Price Trigger (in dollars per share)	$ 17.00
Investment Owned, Threshold Trading Days	20
Investment Owned, Threshold Consecutive Trading Days	30

X

- Definition

Price of the investment's stock which would be required for tradeable feature to become effective.

+ References

No definition available.

+ Details

Name:	cohn_InvestmentOwnedStockPriceTrigger
Namespace Prefix:	cohn_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Threshold number of specified consecutive trading days for investment's stock price after which tradeable feature becomes effective.

+ References

No definition available.

+ Details

Name:	cohn_InvestmentOwnedThresholdConsecutiveTradingDays
Namespace Prefix:	cohn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Threshold number of specified trading days for investment's stock price after which tradeable feature becomes effective

+ References

No definition available.

+ Details

Name:	cohn_InvestmentOwnedThresholdTradingDays
Namespace Prefix:	cohn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=cohn_OperatingLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=cohn_MetromileSharesBecomeFreelyTradeableWhenSharePriceExceedesASpecifiedAmountTrancheOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=cohn_MetromileSharesBecomeFreelyTradeableWhenSharePriceExceedesASpecifiedAmountTrancheTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: