Basis of Presentation and Significant Accounting Policies - Summary of Financial Obligations Including Interest Payments (Details)	Mar. 31, 2020 USD ($)
Mortgage and subordinated notes payable	$ 170,306,000
Other notes payable	8,989,000
Interest	31,722,000
Total	211,017,000
3 Months 2020 [Member]
Mortgage and subordinated notes payable	766,000
Other notes payable	252,000
Interest	2,646,000
Total	3,664,000
Year 2021 [Member]
Mortgage and subordinated notes payable	12,483,000
Other notes payable	4,001,000
Interest	8,596,000
Total	25,080,000
Year 2022 [Member]
Mortgage and subordinated notes payable	3,095,000
Other notes payable	1,033,000
Interest	8,149,000
Total	12,277,000
Year 2023 [Member]
Mortgage and subordinated notes payable	37,816,000
Other notes payable	750,000
Interest	7,013,000
Total	45,579,000
Year 2024 [Member]
Mortgage and subordinated notes payable	107,655,000
Other notes payable	567,000
Interest	3,403,000
Total	111,625,000
Thereafter [Member]
Mortgage and subordinated notes payable	8,491,000
Other notes payable	2,386,000
Interest	1,915,000
Total	$ 12,792,000