Properties and Equipment - Properties and Equipment (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Properties on lease or held for lease, gross	$ 7,088,000	$ 7,088,000
Less accumulated depreciation	332,000	418,000
Properties and equipment net	6,756,000	6,670,000
Land and Land Improvements on Lease or Held for Lease [Member]
Property, Plant and Equipment [Line Items]
Properties on lease or held for lease, gross	4,439,000	4,439,000
Building and Improvements, Steeple Street [Member]
Property, Plant and Equipment [Line Items]
Properties on lease or held for lease, gross	2,582,000	2,582,000
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Properties on lease or held for lease, gross	67,000	67,000
Less accumulated depreciation	67,000	67,000
Land Improvements on Lease or Held for Lease [Member]
Property, Plant and Equipment [Line Items]
Less accumulated depreciation	93,000	93,000
Steeple Street Property [Member]
Property, Plant and Equipment [Line Items]
Less accumulated depreciation	$ 172,000	$ 258,000
Building and Improvements, Steeple Street [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life	30 years
Minimum [Member] | Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Maximum [Member] | Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life	10 years