Concentrations of Risk (Details)	Mar. 31, 2022 portfolioCompany
Risks and Uncertainties [Abstract]
Number of portfolio companies which met at least one of the significant tests under Rule 8-03(b) of Regulation S-X	3

Number Of Portfolio Companies Which Met At Least One Of The Significant Tests Under Rule 8-03(b) Of Regulation S-X

No definition available.

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Namespace Prefix:	cnl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant