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Other Equity Investment in Related Party, at Fair Value (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Aggregate amount	$ 108,000	$ 0

X

- Definition

Aggregate amount.

+ References

No definition available.

+ Details

Name:	SIEB_AggregateAmount
Namespace Prefix:	SIEB_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration