Condensed Consolidated Statements of Equity - USD ($)	Total	Common Stock Common Class C	Common Stock Common Class S	Additional Paid-in Capital	Cumulative Distributions and Net Losses	Total Stockholders' Equity	Noncontrolling Interests in the Operating Partnership
Beginning balance at Dec. 31, 2018	$ 103,092,769	$ 12,943	$ 18	$ 119,247,245	$ (16,167,437)	$ 103,092,769	$ 0
Beginning balance (in shares) at Dec. 31, 2018		12,943,294	17,594
Issuance of common stock (in shares)		3,795,112	168,666
Issuance of common stock	40,245,240	$ 3,795	$ 168	40,241,277		40,245,240
Stock compensation expense (in shares)		20,669
Stock compensation expense	210,000	$ 21		209,979		210,000
Offering costs	(1,206,930)			(1,206,930)		(1,206,930)
Reclassification to redeemable common stock	2,823,079			2,823,079		2,823,079
Repurchase of common stock (in shares)		(842,403)
Repurchase of common stock	(8,379,336)	$ (843)		(8,378,493)		(8,379,336)
Distributions declared	(7,778,197)				(7,778,197)	(7,778,197)
Net loss	(2,973,765)				(2,973,765)	(2,973,765)
Ending balance (in shares) at Sep. 30, 2019		15,916,672	186,260
Ending balance at Sep. 30, 2019	126,032,860	$ 15,916	$ 186	152,936,157	(26,919,399)	126,032,860	0
Beginning balance at Dec. 31, 2018	103,092,769	$ 12,943	$ 18	119,247,245	(16,167,437)	103,092,769	0
Beginning balance (in shares) at Dec. 31, 2018		12,943,294	17,594
Ending balance (in shares) at Dec. 31, 2019		23,647,466	186,606
Ending balance at Dec. 31, 2019	240,172,562	$ 23,647	$ 187	220,714,676	(31,168,948)	189,569,562	50,603,000
Beginning balance at Jun. 30, 2019	120,812,608	$ 15,313	$ 166	144,011,702	(23,214,573)	120,812,608	0
Beginning balance (in shares) at Jun. 30, 2019		15,313,171	166,448
Issuance of common stock (in shares)		988,121	19,812
Issuance of common stock	10,239,749	$ 988	$ 20	10,238,741		10,239,749
Stock compensation expense (in shares)		10,334
Stock compensation expense	105,000	$ 10		104,990		105,000
Offering costs	(307,068)			(307,068)		(307,068)
Reclassification to redeemable common stock	2,823,079			2,823,079		2,823,079
Repurchase of common stock (in shares)		(394,954)
Repurchase of common stock	(3,935,682)	$ (395)		(3,935,287)		(3,935,682)
Distributions declared	(2,784,235)				(2,784,235)	(2,784,235)
Net loss	(920,591)				(920,591)	(920,591)
Ending balance (in shares) at Sep. 30, 2019		15,916,672	186,260
Ending balance at Sep. 30, 2019	126,032,860	$ 15,916	$ 186	152,936,157	(26,919,399)	126,032,860	0
Beginning balance at Dec. 31, 2019	240,172,562	$ 23,647	$ 187	220,714,676	(31,168,948)	189,569,562	50,603,000
Beginning balance (in shares) at Dec. 31, 2019		23,647,466	186,606
Issuance of common stock (in shares)		1,757,559	3,755
Issuance of common stock	16,193,927	$ 1,758	$ 3	16,192,166		16,193,927
Stock compensation expense (in shares)		38,931
Stock compensation expense	313,334	$ 39		313,295		313,334
Class P OP Units compensation expense	266,350			266,350		266,350
Offering costs	(981,748)			(981,748)		(981,748)
Reclassification to redeemable common stock	4,393,863			4,393,863		4,393,863
Repurchase of common stock (in shares)		(1,435,841)	(1,936)
Repurchase of common stock	(13,154,123)	$ (1,436)	$ (2)	(13,152,685)		(13,154,123)
Distributions declared	(9,595,208)				(9,595,208)	(9,595,208)
Net loss	(52,097,300)				(52,097,300)	(52,097,300)
Ending balance (in shares) at Sep. 30, 2020		24,008,115	188,425
Ending balance at Sep. 30, 2020	185,511,657	$ 24,008	$ 188	227,745,917	(92,861,456)	134,908,657	50,603,000
Beginning balance at Jun. 30, 2020	189,662,529	$ 24,137	$ 188	228,696,741	(89,661,537)	139,059,529	50,603,000
Beginning balance (in shares) at Jun. 30, 2020		24,137,134	187,649
Issuance of common stock (in shares)		299,431	776
Issuance of common stock	2,101,688	$ 300		2,101,388		2,101,688
Stock compensation expense (in shares)		26,250
Stock compensation expense	183,750	$ 26		183,724		183,750
Class P OP Units compensation expense	88,784			88,784		88,784
Offering costs	(158,826)			(158,826)		(158,826)
Repurchase of common stock (in shares)		(454,700)
Repurchase of common stock	(3,166,349)	$ (455)		(3,165,894)		(3,166,349)
Distributions declared	(2,135,815)				(2,135,815)	(2,135,815)
Net loss	(1,064,104)				(1,064,104)	(1,064,104)
Ending balance (in shares) at Sep. 30, 2020		24,008,115	188,425
Ending balance at Sep. 30, 2020	$ 185,511,657	$ 24,008	$ 188	$ 227,745,917	$ (92,861,456)	$ 134,908,657	$ 50,603,000