Loans - Schedule of Payments in Arrears Past Due Financing Receivables (Details)	Mar. 31, 2022 USD ($) Loan		Dec. 31, 2021 USD ($) Loan		Dec. 31, 2020 USD ($) Loan
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Monthly payments, interest	$ 48,000		$ 63,000
30-89 days [Member]
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Number of loans | Loan	0		1
Number of loans | Loan	1				2
Past maturity, principal	$ 0		$ 1,050,000
Monthlypayments	1,000				$ 1,000
Past maturity, interest	0	[1]	0	[2]
Monthly payments, interest	3,000	[1]	33,000	[2]
Total payments	$ 4,000		$ 1,084,000
Past Due 90-179 Days [Member]
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Number of loans | Loan	2		1
Number of loans | Loan	0		0
Past maturity, principal	$ 3,200,000		$ 930,000
Monthlypayments	0		0
Past maturity, interest	37,000	[1]	0	[2]
Monthly payments, interest	0	[1]	0	[2]
Total payments	$ 3,237,000		$ 930,000
Past Due 180 Or More Days [Member]
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Number of loans | Loan	2		1
Number of loans | Loan	1		2
Past maturity, principal	$ 1,228,000		$ 300,000
Monthlypayments	0		4,000
Past maturity, interest	0	[1]			$ 0	[2]
Monthly payments, interest	48,000	[1]	92,000	[2]
Total payments	$ 1,276,000		$ 396,000
Total Payments Past Due
Loans Details Secured Loans By Property Type Of Collateral [Line Items]
Number of loans | Loan	4		3
Number of loans | Loan	2		4
Past maturity, principal	$ 4,428,000		$ 2,280,000
Monthlypayments	1,000		5,000
Past maturity, interest	37,000	[1]	0	[2]
Monthly payments, interest	51,000	[1]	125,000	[2]
Total payments	$ 4,517,000		$ 2,410,000

[1] Interest includes foregone interest of approximately $48,000 on non-accrual loans for monthly payments in arrears. March 2022 interest is due April 1, 2022 and is not included in the payments in arrears at March 31, 2022.

[2] Interest includes foregone interest of approximately $63,000 on non-accrual loans with monthly payments in arrears. December
2021 interest is due January 1, 2022 and is not included in the payments in arrears at December 31, 2021.