CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)	Total	Class A Common Stock	Class T Common Stock	Common Stock Class A Common Stock	Common Stock Class T Common Stock	Capital in Excess of Par Value	Accumulated Distributions in Excess of Earnings
Balance (in shares) at Dec. 31, 2018				2,424,682	747,316
Balance at Dec. 31, 2018	$ 22,463,281			$ 24,179	$ 7,473	$ 28,016,307	$ (5,584,678)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)				47,124	9,112
Issuance of common stock	538,763			$ 471	$ 91	538,201
Equity-based compensation	20,626			$ 23		20,603
Distributions declared on common stock	(458,852)						(458,852)
Commissions on stock sales and related dealer manager fees	(30,501)					(30,501)
Other offering costs	(5,909)					(5,909)
Distribution and stockholder servicing fees	(1,000)					(1,000)
Redemptions of common stock (in shares)				(5,403)
Redemptions of common stock	(48,623)			$ (54)		(48,569)
Changes in redeemable common stock	42,019					42,019
Net income (loss)	(209,262)						(209,262)
Balance (in shares) at Mar. 31, 2019				2,466,403	756,428
Balance at Mar. 31, 2019	22,310,542			$ 24,619	$ 7,564	28,531,151	(6,252,792)
Balance (in shares) at Dec. 31, 2018				2,424,682	747,316
Balance at Dec. 31, 2018	22,463,281			$ 24,179	$ 7,473	28,016,307	(5,584,678)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(350,208)	$ (246,837)	$ (103,371)
Balance (in shares) at Jun. 30, 2019				2,480,368	741,348
Balance at Jun. 30, 2019	21,930,665			$ 24,781	$ 7,414	28,681,652	(6,783,182)
Balance (in shares) at Mar. 31, 2019				2,466,403	756,428
Balance at Mar. 31, 2019	22,310,542			$ 24,619	$ 7,564	28,531,151	(6,252,792)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)				13,965	6,346
Issuance of common stock	174,673			$ 140	$ 64	174,469
Equity-based compensation	20,624			$ 22		20,602
Distributions declared on common stock	(389,444)						(389,444)
Other offering costs	(662)					(662)
Redemptions of common stock (in shares)					(21,426)
Redemptions of common stock	(184,261)				$ (214)	(184,047)
Changes in redeemable common stock	140,139					140,139
Net income (loss)	(140,946)	$ (98,880)	$ (42,066)				(140,946)
Balance (in shares) at Jun. 30, 2019				2,480,368	741,348
Balance at Jun. 30, 2019	21,930,665			$ 24,781	$ 7,414	28,681,652	(6,783,182)
Balance (in shares) at Dec. 31, 2019		2,504,629	722,873	2,504,629	722,873
Balance at Dec. 31, 2019	21,035,626			$ 24,974	$ 7,229	28,707,032	(7,703,609)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)				12,256	3,893
Issuance of common stock	138,880			$ 123	$ 39	138,718
Equity-based compensation	20,625			$ 24		20,601
Distributions declared on common stock	(387,050)						(387,050)
Distribution and stockholder servicing fees	3,770					3,770
Redemptions of common stock (in shares)				(5,543)	(10,959)
Redemptions of common stock	(148,414)			$ (56)	$ (110)	(148,248)
Net income (loss)	61,347						61,347
Balance (in shares) at Mar. 31, 2020				2,511,342	715,807
Balance at Mar. 31, 2020	20,724,784			$ 25,065	$ 7,158	28,721,873	(8,029,312)
Balance (in shares) at Dec. 31, 2019		2,504,629	722,873	2,504,629	722,873
Balance at Dec. 31, 2019	21,035,626			$ 24,974	$ 7,229	28,707,032	(7,703,609)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	136,188	$ 126,649	$ 9,539
Balance (in shares) at Jun. 30, 2020		2,513,761	712,410	2,513,761	712,410
Balance at Jun. 30, 2020	20,435,188			$ 25,114	$ 7,124	28,737,562	(8,334,612)
Balance (in shares) at Mar. 31, 2020				2,511,342	715,807
Balance at Mar. 31, 2020	20,724,784			$ 25,065	$ 7,158	28,721,873	(8,029,312)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)				13,004	4,291
Issuance of common stock	131,620			$ 130	$ 43	131,447
Equity-based compensation	20,626			$ 24		20,602
Distributions declared on common stock	(380,141)						(380,141)
Distribution and stockholder servicing fees	2,337					2,337
Redemptions of common stock (in shares)				(10,585)	(7,688)
Redemptions of common stock	(138,879)			$ (105)	$ (77)	(138,697)
Net income (loss)	74,841	$ 67,944	$ 6,897				74,841
Balance (in shares) at Jun. 30, 2020		2,513,761	712,410	2,513,761	712,410
Balance at Jun. 30, 2020	$ 20,435,188			$ 25,114	$ 7,124	$ 28,737,562	$ (8,334,612)