Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financial asset recorded at fair value on a recurring basis [Abstract]
Interest rate swap	$ 4
Financial liability recorded at fair value on a recurring basis [Abstract]
Interest rate swaps		$ (221)
Fixed-rate debt on Consolidated Balance Sheets
Fixed-rate debt outstanding [abstract]
Fixed-rate debt	1,648	1,855
Estimated fair value of fixed-rate debt
Fixed-rate debt outstanding [abstract]
Fixed-rate debt	1,671	1,915
Recurring
Financial asset recorded at fair value on a recurring basis [Abstract]
Interest rate swap	4
Financial liability recorded at fair value on a recurring basis [Abstract]
Interest rate swaps		(221)
Recurring | Level 1
Financial asset recorded at fair value on a recurring basis [Abstract]
Interest rate swap	0
Financial liability recorded at fair value on a recurring basis [Abstract]
Interest rate swaps		0
Recurring | Level 2
Financial asset recorded at fair value on a recurring basis [Abstract]
Interest rate swap	4
Financial liability recorded at fair value on a recurring basis [Abstract]
Interest rate swaps		(221)
Recurring | Level 3
Financial asset recorded at fair value on a recurring basis [Abstract]
Interest rate swap	$ 0
Financial liability recorded at fair value on a recurring basis [Abstract]
Interest rate swaps		$ 0