Consolidated Statement of Equity - USD ($)	Total	Common Stock Class A [Member]	Common Stock Class T [Member]	Common Stock Class W [Member]	Common Stock Class Y [Member]	Common Stock Class Z [Member]	Additional Paid-in Capital [Member]	Distributions [Member]	Accumulated Deficit [Member]	Strategic Student & Senior Housing Trust, Inc. [Member]	Noncontrolling Interests in our Operating Partnership [Member]	Preferred Equity in our Operating Partnership [Member]	Redeemable Common Stock [Member]
Beginning Balance at Dec. 31, 2019	$ 35,494,345	$ 11,566	$ 77	$ 86	$ 768	$ 159	$ 93,609,304	$ (15,238,571)	$ (41,837,130)	$ 36,546,259	$ (1,051,914)	$ 10,142,303	$ 4,723,961
Beginning Balance, shares at Dec. 31, 2019		11,565,901	76,991	85,198	768,611	159,070
Gross proceeds from issuance of common stock	3,313,673				$ 349	$ 7	3,313,317			3,313,673
Gross proceeds from issuance of common stock, shares					349,320	6,989
Offering costs	(559,004)						(559,004)			(559,004)
Reimbursement of offering costs by Advisor	245,557						245,557			245,557
Changes to redeemable common stock	(625,507)						(625,507)			(625,507)			625,507
Redemptions of common stock	(4)	$ (4)								(4)
Redemptions of common stock (in shares)		(3,544)
Distributions	(1,958,880)							(1,958,880)		(1,958,880)
Distributions for noncontrolling interest	(3,950)										(3,950)
Distributions to preferred unitholders in our Operating Partnership												(259,553)
Issuance of shares for distribution reinvestment plan	625,507	$ 60	$ 1	$ 1	$ 5	$ 1	625,439			625,507
Issuance of shares for distribution reinvestment plan (in shares)		60,450	607	350	5,418	435
Stock based compensation expense	5,875						5,875			5,875
Net loss attributable to Strategic Student & Senior Housing Trust, Inc.	(4,068,077)								(4,068,077)	(4,068,077)		259,553
Net loss attributable to the noncontrolling interests in our Operating Partnership	(8,096)										(8,096)
Accretion of non-cash preferred equity issuance costs												3,884
Ending Balance at Mar. 31, 2020	32,461,439	$ 11,622	$ 78	$ 87	$ 1,122	$ 167	96,614,981	(17,197,451)	(45,905,207)	33,525,399	(1,063,960)	10,146,187	5,349,468
Ending Balance, shares at Mar. 31, 2020		11,622,807	77,598	85,548	1,123,349	166,494
Beginning Balance at Dec. 31, 2019	35,494,345	$ 11,566	$ 77	$ 86	$ 768	$ 159	93,609,304	(15,238,571)	(41,837,130)	36,546,259	(1,051,914)	10,142,303	4,723,961
Beginning Balance, shares at Dec. 31, 2019		11,565,901	76,991	85,198	768,611	159,070
Net loss attributable to Strategic Student & Senior Housing Trust, Inc.	(8,316,824)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(16,566)
Ending Balance at Jun. 30, 2020	29,242,767	$ 11,625	$ 78	$ 87	$ 1,122	$ 167	97,655,806	(17,199,734)	(50,153,954)	30,315,197	(1,072,430)	10,150,066	5,350,610
Ending Balance, shares at Jun. 30, 2020		11,625,430	77,598	85,548	1,123,349	166,494
Beginning Balance at Mar. 31, 2020	32,461,439	$ 11,622	$ 78	$ 87	$ 1,122	$ 167	96,614,981	(17,197,451)	(45,905,207)	33,525,399	(1,063,960)	10,146,187	5,349,468
Beginning Balance, shares at Mar. 31, 2020		11,622,807	77,598	85,548	1,123,349	166,494
Offering costs	(62,721)						(62,721)			(62,721)
Adjustment to offering costs	503,373						503,373			503,373
Reimbursement of offering costs by Advisor	593,991						593,991			593,991
Changes to redeemable common stock	(1,142)						(1,142)			(1,142)			1,142
Distribution of common stock	(2,283)							(2,283)		(2,283)
Issuance of restricted stock	3	$ 3								3
Issuance of restricted stock (in shares)		2,500
Distributions to preferred unitholders in our Operating Partnership												(265,207)
Issuance of shares for distribution reinvestment plan	1,142						1,142			1,142
Issuance of shares for distribution reinvestment plan (in shares)		123
Stock based compensation expense	6,182						6,182			6,182
Net loss attributable to Strategic Student & Senior Housing Trust, Inc.	(4,248,747)								(4,248,747)	(4,248,747)		265,207
Net loss attributable to the noncontrolling interests in our Operating Partnership	(8,470)										(8,470)
Accretion of non-cash preferred equity issuance costs												3,879
Ending Balance at Jun. 30, 2020	29,242,767	$ 11,625	$ 78	$ 87	$ 1,122	$ 167	97,655,806	(17,199,734)	(50,153,954)	30,315,197	(1,072,430)	10,150,066	5,350,610
Ending Balance, shares at Jun. 30, 2020		11,625,430	77,598	85,548	1,123,349	166,494
Beginning Balance at Dec. 31, 2020	21,366,654	$ 11,625	$ 78	$ 87	$ 1,122	$ 167	97,676,432	(17,199,735)	(58,034,575)	22,455,201	(1,088,547)	10,157,829	5,350,610
Beginning Balance, shares at Dec. 31, 2020		11,625,430	77,598	85,548	1,123,349	166,494
Distributions to preferred unitholders in our Operating Partnership												(281,110)
Stock based compensation expense	5,648						5,648			5,648
Net loss attributable to Strategic Student & Senior Housing Trust, Inc.	(3,842,109)								(3,842,109)	(3,842,109)		281,110
Net loss attributable to the noncontrolling interests in our Operating Partnership	(7,903)										(7,903)
Accretion of non-cash preferred equity issuance costs												3,882
Ending Balance at Mar. 31, 2021	17,522,290	$ 11,625	$ 78	$ 87	$ 1,122	$ 167	97,682,080	(17,199,735)	(61,876,684)	18,618,740	(1,096,450)	10,161,711	5,350,610
Ending Balance, shares at Mar. 31, 2021		11,625,430	77,598	85,548	1,123,349	166,494
Beginning Balance at Dec. 31, 2020	21,366,654	$ 11,625	$ 78	$ 87	$ 1,122	$ 167	97,676,432	(17,199,735)	(58,034,575)	22,455,201	(1,088,547)	10,157,829	5,350,610
Beginning Balance, shares at Dec. 31, 2020		11,625,430	77,598	85,548	1,123,349	166,494
Net loss attributable to Strategic Student & Senior Housing Trust, Inc.	(5,037,791)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(10,081)
Ending Balance at Jun. 30, 2021	16,330,648	$ 11,627	$ 78	$ 87	$ 1,122	$ 167	97,688,296	(17,199,735)	(63,072,366)	17,429,276	(1,098,628)	10,165,594	5,350,610
Ending Balance, shares at Jun. 30, 2021		11,627,930	77,598	85,548	1,123,349	166,494
Beginning Balance at Mar. 31, 2021	17,522,290	$ 11,625	$ 78	$ 87	$ 1,122	$ 167	97,682,080	(17,199,735)	(61,876,684)	18,618,740	(1,096,450)	10,161,711	5,350,610
Beginning Balance, shares at Mar. 31, 2021		11,625,430	77,598	85,548	1,123,349	166,494
Issuance of restricted stock	2	$ 2								2
Issuance of restricted stock (in shares)		2,500
Distributions to preferred unitholders in our Operating Partnership												(289,474)
Stock based compensation expense	6,216						6,216			6,216
Net loss attributable to Strategic Student & Senior Housing Trust, Inc.	(1,195,682)								(1,195,682)	(1,195,682)		289,474
Net loss attributable to the noncontrolling interests in our Operating Partnership	(2,178)										(2,178)
Accretion of non-cash preferred equity issuance costs												3,883
Ending Balance at Jun. 30, 2021	$ 16,330,648	$ 11,627	$ 78	$ 87	$ 1,122	$ 167	$ 97,688,296	$ (17,199,735)	$ (63,072,366)	$ 17,429,276	$ (1,098,628)	$ 10,165,594	$ 5,350,610
Ending Balance, shares at Jun. 30, 2021		11,627,930	77,598	85,548	1,123,349	166,494