Basis of Presentation and Significant Accounting Policies - Summary of Financial Obligations Including Interest Payments (Details)	Sep. 30, 2019 USD ($)
Mortgage and subordinated notes payable	$ 171,849,000
Other notes payable	9,476,000
Interest	35,825,000
Total	217,150,000
9 Months 2020 [Member]
Mortgage and subordinated notes payable	2,315,000
Other notes payable	764,000
Interest	6,748,000
Total	9,827,000
Year 2021 [Member]
Mortgage and subordinated notes payable	12,483,000
Other notes payable	3,991,000
Interest	8,601,000
Total	25,075,000
Year 2022 [Member]
Mortgage and subordinated notes payable	3,095,000
Other notes payable	1,022,000
Interest	8,148,000
Total	12,265,000
Year 2023 [Member]
Mortgage and subordinated notes payable	37,812,000
Other notes payable	744,000
Interest	7,013,000
Total	45,569,000
Year 2024 [Member]
Mortgage and subordinated notes payable	107,655,000
Other notes payable	567,000
Interest	3,401,000
Total	111,623,000
Thereafter [Member]
Mortgage and subordinated notes payable	8,489,000
Other notes payable	2,388,000
Interest	1,914,000
Total	$ 12,791,000