Note Payable - Revolving Credit Line - Additional Information (Details) - BankRI [Member] - Line [Member]	1 Months Ended	9 Months Ended
	Mar. 31, 2021 USD ($)	Sep. 30, 2023
Line Of Credit Facility [Line Items]
Revolving credit line, maximum borrowing capacity	$ 2,000,000
Maturity date	Mar. 31, 2024
Interest rate, description		After June 30, 2023, amounts outstanding under the Agreement bear interest at the rate of the Secured Overnight Financing Rate ("SOFR") plus the one-month SOFR Spread Adjustment of .11448%, but not less than 3.25% or, at the option of the Company, the Wall Street Journal Prime Rate.
Revolving credit line, collateral, description		Borrowings under the Line are secured by a First Mortgage on Parcel 5 in the Capital Center District in Providence, Rhode Island (the “Property”).
Revolving credit line, covenant terms		The Agreement contains other restrictive covenants, including, among others, a $250,000 limitation on the purchase of its outstanding capital stock in any twelve-month period.
Limitation on the purchase of outstanding capital stock	$ 250,000
Advances made under line	$ 0
SOFR [Member]
Line Of Credit Facility [Line Items]
Interest rate		0.11448%
Maximum [Member]
Line Of Credit Facility [Line Items]
Debt service coverage ratio	1.20
Maximum [Member] | SOFR [Member]
Line Of Credit Facility [Line Items]
Interest rate		3.25%
Minimum [Member]
Line Of Credit Facility [Line Items]
Debt service coverage ratio	1.0
Property [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Debt service coverage ratio	1.25
Property [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Debt service coverage ratio	1.0