Schedule III - Consolidated Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 70,242
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land	28,847
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	45,824
Real Estate And Accumulated Depreciation Buildings And Improvements	6,292
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Amount of Land	28,847
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Amount of Buildings and Improvements	52,116
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Total	80,963	$ 80,908	$ 80,821
SEC Schedule III, Real Estate Accumulated Depreciation	13,629	$ 10,868	$ 8,115
Deferred Offering Costs, Net	1,200
Paramus Nj [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	12,750
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land	908
Real Estate Under Development	0
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,647
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate And Accumulated Depreciation Buildings And Improvements	6,136
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Amount of Land	908
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Amount Of Real Estate Under Development	0
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Amount of Buildings and Improvements	9,783
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Total	10,691
SEC Schedule III, Real Estate Accumulated Depreciation	$ 7,815
SEC Schedule III, Real Estate And Accumulated Depreciation Date of Acquisition 1	1980
Brooklyn New York [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 57,492
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land	27,939
Real Estate Under Development	0
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	42,177
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate And Accumulated Depreciation Buildings And Improvements	156
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Amount of Land	27,939
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Amount Of Real Estate Under Development	0
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Amount of Buildings and Improvements	42,333
SEC Schedule III, Real Estate and Accumulated Depreciation, Carried Total	70,272
SEC Schedule III, Real Estate Accumulated Depreciation	$ 5,814
SEC Schedule III, Real Estate And Accumulated Depreciation Date of Acquisition 1	2018
Maximum
Useful lives	39 years
Minimum
Useful lives	10 years