Subsequent Events (Narrative) (Details)			2 Months Ended	3 Months Ended				12 Months Ended
	Mar. 30, 2020 USD ($) item	Feb. 14, 2020 USD ($)	Mar. 29, 2020	Dec. 31, 2019 USD ($)	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Atlanta Joint Venture [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Purchase price		$ 7,300,000
KeyBank Credit Facility [Member]
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity				$ 150,000,000				$ 150,000,000	$ 150,000,000
Maturity date of debt								Oct. 31, 2020
Minimum debt yield ratio								10.00%
Fixed charge coverage ratio				1.50	1.50	1.50	1.50
KeyBank Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity	$ 102,000,000
Maturity date of debt	Apr. 01, 2021
Number of loan extensions | item	2
Minimum debt yield ratio	10.00%
Dividends or distributions permitted under loan modification	$ 0
Additional recourse debt or investments permitted under loan modification	$ 0
Increase in interest rate spreads	0.25%
Increase in interest rate intervals	6 months
KeyBank Credit Facility [Member] | Subsequent Event [Member] | Extension Option 1 [Member]
Subsequent Event [Line Items]
Extension period	6 months
KeyBank Credit Facility [Member] | Subsequent Event [Member] | Extension Option 2 [Member]
Subsequent Event [Line Items]
Extension period	5 months
KeyBank Credit Facility [Member] | Atlanta Joint Venture [Member]
Subsequent Event [Line Items]
Maturity date of debt								Feb. 09, 2020
KeyBank Credit Facility [Member] | Atlanta Joint Venture [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Maturity date of debt	Apr. 01, 2021		May 08, 2020
Minimum [Member] | KeyBank Credit Facility [Member]
Subsequent Event [Line Items]
Fixed charge coverage ratio								1.25
Minimum [Member] | KeyBank Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Fixed charge coverage ratio	1.25
Maximum [Member] | KeyBank Credit Facility [Member]
Subsequent Event [Line Items]
Leverage ratio								60.00%
Fixed charge coverage ratio								1.50
Maximum [Member] | KeyBank Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Leverage ratio	60.00%
Fixed charge coverage ratio	1.50
LIBOR [Member] | KeyBank Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Basis spread	3.25%
Floor rate	0.25%
LIBOR [Member] | KeyBank Credit Facility [Member] | Atlanta Joint Venture [Member]
Subsequent Event [Line Items]
Basis spread								2.25%
LIBOR [Member] | Minimum [Member] | KeyBank Credit Facility [Member]
Subsequent Event [Line Items]
Basis spread								2.25%
LIBOR [Member] | Maximum [Member] | KeyBank Credit Facility [Member]
Subsequent Event [Line Items]
Basis spread								3.00%
Base Rate [Member] | KeyBank Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Basis spread	2.25%
Base Rate [Member] | KeyBank Credit Facility [Member] | Atlanta Joint Venture [Member]
Subsequent Event [Line Items]
Basis spread								1.25%
Base Rate [Member] | Minimum [Member] | KeyBank Credit Facility [Member]
Subsequent Event [Line Items]
Basis spread								1.25%
Base Rate [Member] | Maximum [Member] | KeyBank Credit Facility [Member]
Subsequent Event [Line Items]
Basis spread								2.00%