Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items]
Deferred rent asset	$ 145,428		$ 126,655
Deferred rent liability	185,805		188,595
Prepaid rent	149,400		165,800
Impairments	0	$ 0
Costs associated with public equity raise	1,261,000		$ 614,000
Additional Paid-In- Capital
Summary Of Significant Accounting Policies [Line Items]
Costs associated with public equity raise	$ 1,261,000
Buildings | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	30 years
Buildings | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	50 years
Tenant Improvements | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	2 years
Tenant Improvements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	10 years