Summary of Significant Accounting Policies Disaggregation of Revenues (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Resident fees and services	$ 18,948,000	$ 11,865,000	$ 51,863,000	$ 34,053,000
Senior Housing-RIDEA
Resident fees and services	18,948,000	11,865,000	51,863,000	34,053,000
Senior Housing-RIDEA | Transferred at Point in Time
Resident fees and services	174,000	144,000	746,000	501,000
Senior Housing-RIDEA | Transferred over Time
Resident fees and services	18,774,000	11,721,000	51,117,000	33,552,000
Resident Fees and Services
Resident fees and services	18,948,000	11,865,000	51,863,000	34,053,000
Private and Other Payors | Resident Fees and Services
Resident fees and services	17,300,000	10,451,000	46,766,000	29,553,000
Medicaid | Resident Fees and Services
Resident fees and services	$ 1,648,000	$ 1,414,000	$ 5,097,000	$ 4,500,000