Real Estate, Net - Additional Information (Details) - USD ($)	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2021	Apr. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Apr. 06, 2020	Apr. 05, 2020	May 24, 2018
Depreciation			$ 405,000	$ 403,000	$ 810,000	$ 806,000
Total Purchase Price Of Property										$ 81,200,000
Business Acquisition, Transaction Costs										$ 700,000
Percentage of property leased	90.70%
Finite-Lived Intangible Assets, Net			11,100,000		11,100,000		$ 11,100,000
Accumulated amortization					2,300,000		$ 1,900,000
Amortization of Intangible Assets			185,000	$ 185,000	370,000	$ 370,000
Aggregate fees paid by SCA to the Company			46,000,000.0		46,000,000.0
Remaining fees to be paid by SCA to the Company			495,000		495,000
Gain on sale of school condominium		$ 20,000,000.0
Gain on sale of school condominium, recognition of deferred construction supervision fee		$ 4,200,000
Liquidity requirement								$ 10,000,000.0	$ 15,000,000.0
SCA [Member]
Contract Receivable			41,500,000		41,500,000
Construction Supervision Fee receivable			$ 5,000,000.0		5,000,000.0
Construction Costs Reimbursed					$ 49,500,000