Mortgage Revenue Bonds - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule Of Available For Sale Securities [Line Items]
Provision for credit loss	$ 900,080	$ 0	$ 900,080
Provision Center 2014-1 [Member]
Schedule Of Available For Sale Securities [Line Items]
Provision for credit loss	$ 900,000		$ 900,000

Amount of expense related to estimated loss from loan and lease transactions.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration