Consolidated Statement of Changes in Stockholders' Equity (unaudited) - USD ($)	Total	Class A Common Stock	Class T Common Stock	Class R Common Stock	Class I Common Stock	Common Stock Class A Common Stock	Common Stock Class T Common Stock	Common Stock Class R Common Stock	Common Stock Class I Common Stock	Preferred Stock Convertible Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance at Dec. 31, 2017	$ 27,132,505					$ 6,218	$ 10,812	$ 20,580	$ 361	$ 500	$ 32,323,424	$ (11,192)	$ (5,218,198)
Beginning balance (in shares) at Dec. 31, 2017						621,754	1,081,226	2,058,008	36,118	50,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	23,056,526							$ 23,301	$ 969		23,032,256
Issuance of common stock (in shares)								2,330,100	96,897
Offering costs	(3,217,795)										(3,217,795)
Cash distributions declared	(1,344,932)	$ (165,068)	$ (235,694)	$ (908,929)	$ (35,241)								(1,344,932)
Common stock issued through distribution reinvestment plan	605,527					$ 64	$ 162	$ 432	$ 2		604,867
Common stock issued through distribution reinvestment plan (in shares)						6,484	16,174	43,143	217
Other comprehensive income	(17,270)											(17,270)
Net loss	(2,214,605)												(2,214,605)
Share redemptions	(18,506)						$ (21)				(18,485)
Share redemptions (in shares)							(2,154)
Ending balance at Jun. 30, 2018	43,981,450					$ 6,282	$ 10,953	$ 44,313	$ 1,332	$ 500	52,724,267	(28,462)	(8,777,735)
Ending balance (in shares) at Jun. 30, 2018						628,238	1,095,246	4,431,251	133,232	50,000
Beginning balance at Mar. 31, 2018	36,673,447					$ 6,241	$ 10,845	$ 33,141	$ 614	$ 500	43,261,424	(7,153)	(6,632,165)
Beginning balance (in shares) at Mar. 31, 2018						624,078	1,084,484	3,314,097	61,380	50,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	10,974,832							$ 10,850	$ 717		10,963,265
Issuance of common stock (in shares)								1,084,995	71,705
Offering costs	(1,932,959)										(1,932,959)
Cash distributions declared	(757,120)	$ (81,956)	$ (119,360)	$ (530,248)	$ (25,556)								(757,120)
Common stock issued through distribution reinvestment plan	433,009					$ 41	$ 108	$ 322	$ 1		432,537
Common stock issued through distribution reinvestment plan (in shares)						4,160	10,762	32,159	147
Other comprehensive income	(21,309)											(21,309)
Net loss	(1,388,450)												(1,388,450)
Ending balance at Jun. 30, 2018	43,981,450					$ 6,282	$ 10,953	$ 44,313	$ 1,332	$ 500	52,724,267	(28,462)	(8,777,735)
Ending balance (in shares) at Jun. 30, 2018						628,238	1,095,246	4,431,251	133,232	50,000
Beginning balance at Dec. 31, 2018	62,489,567					$ 6,345	$ 11,114	$ 71,815	$ 3,296	$ 500	77,896,470	(40,633)	(15,459,340)
Beginning balance (in shares) at Dec. 31, 2018		634,493	1,111,394	7,181,534	329,604	634,493	1,111,394	7,181,534	329,604	50,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	22,018,259							$ 19,989	$ 2,836		21,995,434
Issuance of common stock (in shares)								1,998,867	283,601
Offering costs	(2,473,982)										(2,473,982)
Cash distributions declared	(2,610,043)	$ (169,363)	$ (244,076)	$ (2,034,919)	$ (161,764)								(2,610,043)
Common stock issued through distribution reinvestment plan	1,243,229	$ 51,470	$ 146,516	$ 1,035,611	$ 9,631	$ 56	$ 161	$ 1,138	$ 11		1,241,863
Common stock issued through distribution reinvestment plan (in shares)						5,659	16,107	113,817	1,057
Other comprehensive income	869											869
Net loss	(5,387,310)												(5,387,310)
Share redemptions	(388,423)					$ (169)	$ (281)				(387,973)
Share redemptions (in shares)		(16,914)	(28,087)	0	0	(16,914)	(28,087)
Ending balance at Jun. 30, 2019	74,892,166					$ 6,232	$ 10,994	$ 92,942	$ 6,143	$ 500	98,271,812	(39,764)	(23,456,693)
Ending balance (in shares) at Jun. 30, 2019		623,238	1,099,414	9,294,218	614,262	623,238	1,099,414	9,294,218	614,262	50,000
Beginning balance at Mar. 31, 2019	72,940,351					$ 6,373	$ 11,194	$ 87,443	$ 4,561	$ 500	92,373,880	(41,810)	(19,501,790)
Beginning balance (in shares) at Mar. 31, 2019						637,293	1,119,361	8,744,329	456,135	50,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	6,224,968							$ 4,886	$ 1,574		6,218,508
Issuance of common stock (in shares)								488,614	157,334
Offering costs	(598,229)										(598,229)
Cash distributions declared	(1,353,000)	$ (84,122)	$ (121,545)	$ (1,047,968)	$ (99,443)								(1,353,000)
Common stock issued through distribution reinvestment plan	666,356	$ 26,066	$ 74,229	$ 558,826	$ 7,235	$ 28	$ 81	$ 613	$ 8		665,626
Common stock issued through distribution reinvestment plan (in shares)						2,859	8,140	61,275	793
Other comprehensive income	2,046											2,046
Net loss	(2,601,903)												(2,601,903)
Share redemptions	(388,423)					$ (169)	$ (281)				(387,973)
Share redemptions (in shares)						(16,914)	(28,087)
Ending balance at Jun. 30, 2019	$ 74,892,166					$ 6,232	$ 10,994	$ 92,942	$ 6,143	$ 500	$ 98,271,812	$ (39,764)	$ (23,456,693)
Ending balance (in shares) at Jun. 30, 2019		623,238	1,099,414	9,294,218	614,262	623,238	1,099,414	9,294,218	614,262	50,000