Five Year Minimum Rental Payments - Schedule of Estimated Future Minimum Rents (Detail)	Sep. 30, 2021 USD ($)
Operating Leased Assets [Line Items]
2021 (remaining)	$ 5,111,601
2022	20,068,550
2023	20,622,543
2024	21,002,095
2025	21,398,878
Thereafter	162,963,150
Total	251,166,817
GR Property [Member]
Operating Leased Assets [Line Items]
2021 (remaining)	125,000
2022	500,000
2023	500,000
2024	500,000
2025	500,000
Thereafter	3,250,000
Total	5,375,000
FM Property [Member]
Operating Leased Assets [Line Items]
2021 (remaining)	640,074
2022	2,611,352
2023	2,663,909
2024	2,716,467
2025	2,770,526
Thereafter	8,649,446
Total	20,051,774
CO Property [Member]
Operating Leased Assets [Line Items]
2021 (remaining)	809,932
2022	3,251,284
2023	3,286,073
2024	3,321,234
2025	3,356,771
Thereafter	23,572,354
Total	37,597,648
Lewisville Property [Member]
Operating Leased Assets [Line Items]
2021 (remaining)	228,983
2022	915,933
2023	943,411
2024	943,411
2025	971,713
Thereafter	2,443,858
Total	6,447,309
DST Properties [Member]
Operating Leased Assets [Line Items]
2021 (remaining)	562,714
2022	2,305,756
2023	2,305,756
2024	2,305,756
2025	2,320,167
Thereafter	27,753,863
Total	37,554,012
SF Property [Member]
Operating Leased Assets [Line Items]
2021 (remaining)	146,518
Total	146,518
Buchanan Property [Member]
Operating Leased Assets [Line Items]
2021 (remaining)	258,714
2022	1,034,857
2023	1,075,458
2024	1,079,150
2025	1,079,150
Thereafter	6,938,466
Total	11,465,795
Madison Ave Property [Member]
Operating Leased Assets [Line Items]
2021 (remaining)	347,260
2022	1,305,120
2023	1,459,361
2024	1,495,845
2025	1,533,241
Thereafter	8,705,222
Total	14,846,049
Valencia Property [Member]
Operating Leased Assets [Line Items]
2021 (remaining)	1,066,058
2022	4,392,159
2023	4,523,923
2024	4,659,641
2025	4,799,430
Thereafter	56,670,698
Total	76,111,909
De Anza Property [Member]
Operating Leased Assets [Line Items]
2021 (remaining)	926,348
2022	3,752,089
2023	3,864,652
2024	3,980,591
2025	4,067,880
Thereafter	24,979,243
Total	$ 41,570,803

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Amount of lease payments to be received by lessor for operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
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+ References

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