Subsequent Events - Additional Information (Detail)							12 Months Ended
	Mar. 25, 2022 USD ($) shares	Mar. 14, 2022 USD ($)	Mar. 11, 2022 USD ($)	Mar. 01, 2022 $ / shares	Dec. 31, 2021 USD ($) ft² shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2021 USD ($) ft² RepurchaseRequest shares	Dec. 31, 2020 USD ($) shares
Subsequent Event [Line Items]
Building and building improvements | $					$ 545,727,805	$ 140,185,153	$ 545,727,805	$ 140,185,153
Stock repurchased, shares							327,261	214,043
Stock repurchase | $							$ 7,980,257	$ 5,061,011
Common stock, shares					9,497,468	6,387,089
Class AX [Member]
Subsequent Event [Line Items]
Common stock, shares					3,433,039	3,450,361
Class IX [Member]
Subsequent Event [Line Items]
Common stock, shares					1,203,025	1,218,108
Class T [Member]
Subsequent Event [Line Items]
Common stock, shares					555,074	44,884
Class TX [Member]
Subsequent Event [Line Items]
Common stock, shares					1,319,066	1,472,875
Class I [Member]
Subsequent Event [Line Items]
Common stock, shares					2,707,306	160,013
Class D [Member]
Subsequent Event [Line Items]
Common stock, shares					275,596	39,281
Class S [Member]
Subsequent Event [Line Items]
Common stock, shares					4,362	1,567
Common Stock [Member]
Subsequent Event [Line Items]
Number of eligible repurchase requests | RepurchaseRequest							20
Stock repurchased, shares							40,006
Stock repurchase | $							$ 1,029,484
Common Stock [Member] | Class AX [Member]
Subsequent Event [Line Items]
Stock repurchased, shares							222,440	154,701
Stock repurchase | $							$ 2,224	$ 1,547
Common stock, shares							126,710	377,318
Common Stock [Member] | Class IX [Member]
Subsequent Event [Line Items]
Stock repurchased, shares							42,321	21,017
Stock repurchase | $							$ 423	$ 210
Common stock, shares								362,238
Common Stock [Member] | Class T [Member]
Subsequent Event [Line Items]
Common stock, shares							508,120	44,884
Common Stock [Member] | Class TX [Member]
Subsequent Event [Line Items]
Stock repurchased, shares							58,754	38,325
Stock repurchase | $							$ 588	$ 383
Common stock, shares							(126,811)	153,033
Common Stock [Member] | Class I [Member]
Subsequent Event [Line Items]
Common stock, shares							2,533,229	159,581
Common Stock [Member] | Class D [Member]
Subsequent Event [Line Items]
Stock repurchased, shares							3,746
Stock repurchase | $							$ 37
Common stock, shares							237,685	39,256
Common Stock [Member] | Class S [Member]
Subsequent Event [Line Items]
Common stock, shares							2,789	1,566
Subsequent Event [Member]
Subsequent Event [Line Items]
Proceeds from offerings | $	$ 281,286,956
Common stock, shares	11,441,888
Distributions declared on an annual basis | $ / shares				$ 1.55
Subsequent Event [Member] | Class AX [Member]
Subsequent Event [Line Items]
Common stock, shares	3,610,131
Subsequent Event [Member] | Class IX [Member]
Subsequent Event [Line Items]
Common stock, shares	1,209,492
Subsequent Event [Member] | Class T [Member]
Subsequent Event [Line Items]
Common stock, shares	735,856
Subsequent Event [Member] | Class TX [Member]
Subsequent Event [Line Items]
Common stock, shares	1,132,974
Subsequent Event [Member] | Class I [Member]
Subsequent Event [Line Items]
Common stock, shares	4,371,513
Subsequent Event [Member] | Class D [Member]
Subsequent Event [Line Items]
Common stock, shares	377,559
Subsequent Event [Member] | Class S [Member]
Subsequent Event [Line Items]
Common stock, shares	4,363
Subsequent Event [Member] | 3596 Alpine Avenue, LLC [Member] | Walgreen Co [Member]
Subsequent Event [Line Items]
Payment for waiver of termination of lease | $		$ 900,000
Subsequent Event [Member] | Minimum [Member] | 3596 Alpine Avenue, LLC [Member]
Subsequent Event [Line Items]
Lease extended maturity term		5 years
Subsequent Event [Member] | Minimum [Member] | 3596 Alpine Avenue, LLC [Member] | Walgreen Co [Member]
Subsequent Event [Line Items]
Lease extended maturity term		5 years
Lease term		9 years 2 months 12 days
Subsequent Event [Member] | Maximum [Member] | 3596 Alpine Avenue, LLC [Member]
Subsequent Event [Line Items]
Lease extended maturity term		Jul. 31, 2087
Subsequent Event [Member] | Maximum [Member] | 3596 Alpine Avenue, LLC [Member] | Walgreen Co [Member]
Subsequent Event [Line Items]
Lease extended maturity term		Jul. 31, 2037
Lease term		9 years 4 months 24 days
CO Property Sublease [Member]
Subsequent Event [Line Items]
Net rentable area | ft²					233,573		233,573
Lease maturity of existing lease							92 months
Building and building improvements | $					$ 5,800,000		$ 5,800,000
Fisher Rd Property [Member]
Subsequent Event [Line Items]
Proceeds from offerings | $							8,600,000
Fisher Rd Property [Member] | Subsequent Event [Member] | Columbus, OH [Member]
Subsequent Event [Line Items]
Contract purchase price | $			$ 58,000,000
Citizens Facility [Member]
Subsequent Event [Line Items]
Advance on facility | $							$ 50,000,000